Malicious PDF — malware analysis report

Static analysis result for SHA-256 031df72b279f5867…

MALICIOUS

PDF

87.1 KB Created: 2021-07-19 00:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f5e27d7d8b617f33637e2fc1c4390213 SHA-1: 8b2b026774093a59e49c78e23a35f757e374d7a1 SHA-256: 031df72b279f58676e3edd5bbf06c478ba403cc023e6d9783422bb014f4d91b5
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document exhibits multiple high-severity heuristics indicating malicious intent. It contains instructions to bypass security software and execute commands via the clipboard, a common lure for malware execution. The presence of numerous links to compromised or disposable hosting sites, coupled with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests it's part of a phishing or malware distribution campaign. The document likely aims to deceive the user into downloading and executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dienlanhbachkhoa.info/upload/files/77742484266.pdf In PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/varepalivupumufol.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796b701a7a2---torosaxitudenaw.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/187509b063376e0fefe46fe54ca1be2d/gitaburuvololajusilekabik.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/ba2fc86bb163f35b7f051561d860cef1/zedaluvigodalugoragav.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc8778664b2---83508880396.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609120c437da8---40807750789.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/33298531982.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3ace48189---vizoxirafijup.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/setiwum.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/a5f6facf0bfd805e64e613bb2d3de549/pororojelovo.pdfIn PDF document text
    • http://gchs1969.com/clients/867877/File/vedurojukopaxak.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/0e435f0eb483fcdf9f9711f187bc3fd4/sugujulawiw.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/2c7cbdaf0a426f8aae1cf820de391b9b/18858344096.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/jafariwisusoleposugofomol.pdfIn PDF document text
    • http://maihome.hu/admin1/file/54298777111.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160b022f9c1141---58100030566.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/54360281030.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/jodaken.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/vulinofesokojowarosunox.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/7d9631ab580347e685381abb1c182c29/tunasisiv.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a32fe0e0589---lerolebijiramamukere.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54c2fd3993---fexiwinanomodubar.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/guruzize.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/198c97f2194c759c5abe5461188e3185/bimajitidagemorifa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=office+2016+activator+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001097b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097B 10564 bytes
SHA-256: 3a824625f92a0fd3439bb363c28f4a5fbefc8ae86cc9d5330d934d84ba559b7f
font_02_sfnt_off000121d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D7 17480 bytes
SHA-256: 63008ecb24528b51c7470d61352ce134f03fb5a2e8663d3cac56865daf73701e

Open this report in the interactive analyzer, or submit your own file for analysis.