Malicious PDF — malware analysis report

Static analysis result for SHA-256 1954a648cca03c77…

MALICIOUS

PDF

79.5 KB Created: 2021-06-29 22:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1886a65ce2e3e55fb198f641c9413243 SHA-1: 9cf292373b84e30d857f1ca7682d0ab4e50af2c4 SHA-256: 1954a648cca03c77e4114bb40ccc79868b3283be746ce8a42ad5b6c370722dec
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073da3b54d57---gupoxoduxeniloti.pdf In PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/f1e5d8ae34efd0eca51f8370fdd4e3f5/werekibo.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/rutunaxedadomilusudujiv.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/cec07b81bb19a91be234de55436b57f1/gajekibux.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/rajipaneziwe.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/topaninisogu.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd220acc92---davijosagakux.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/fikanilulirijakulugi.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9e3373494---76781236779.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/45264884973.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc4e217074---saxolirusoxizenipeziv.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/damaduromi.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/1771985730.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a356835988c---55335380397.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7afcbb4f0---87576620207.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/dunetijegaxagi.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/70937708009.pdfIn PDF document text
    • http://ailizia.com/userfiles/65348096463.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c76f0b1d330---47270531081.pdfIn PDF document text
    • https://tangentemag.com/img/file/87061931936.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/gunasulusubofimid.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/i3q57c5ie27ountn9v396irdrd/50847641335.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/rivulovafezewaxasakoju.pdfIn PDF document text
    • https://businesslife.com/content/file/19090143986.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/bbac559f6f29e6026897a14405597148/xavikiwugeli.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34027886d3---81447023195.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=laws+of+motion+activity+sheetPDF 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_off0000d421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD421 10676 bytes
SHA-256: 6eb76ffe594dbad9f6193e2ede8fd45dfe1edeab08ca4c0ac976fb7dea0abbf0
font_01_sfnt_off0000ec89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC89 16808 bytes
SHA-256: 3a699a473f2c2a1245d01a007728126509466f665e089bd83570537f8c0566b4
font_02_sfnt_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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