Malicious PDF — malware analysis report

Static analysis result for SHA-256 52fadf9498de8eb8…

MALICIOUS

PDF

84.6 KB Created: 2021-09-06 11:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eb6fb64cbfcedcdbf28bae621e4c55ec SHA-1: 7664f5c5760f868318a7f6df30c905344a6c4fc3 SHA-256: 52fadf9498de8eb804d07677b170e6d77cd3a2f9366f7c58c46d1c20363f1bf2
236 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The document employs social engineering tactics, specifically a 'ClickFix' lure, by instructing the user to execute commands via Win+R or a terminal. This indicates an attempt to bypass macro restrictions and directly trick the user into running malicious code. The presence of numerous links to compromised WordPress upload directories further suggests a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16091ec95cd55b---dasuwame.pdf In PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a316a535b5c---lupajuj.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/r38hv3nu44teptlioufte40k1g/41482798015.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hl0q68r9ona74c2r4686g60bb2/7065275836.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/vexuminodozigig.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/pikitot.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/terob.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/9t4v2e0hnph9lvotf75h1fn7b2/tawelekixulorowolejot.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///bupexalonikokupoxagatoz.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/3556103973.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/53667368339.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085fbb115676---17045435957.pdfIn PDF document text
    • https://manenshop.com/upload/files/51525290242.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/20425973044.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/tutifizo.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608780a71d74a---65344947137.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/d85a89d666803a72c1f1fe962864fca9/62336149837.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/97334931767.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/8580038845.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/fhn060ri15eai1cjvo70s1p77k/narefedubixeporiwaweto.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/mjc0604otn62fa0hd9nun521ul/wofomarabuwupivejef.pdfIn PDF document text
    • http://shesob.com/file/files/gebom.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/bkvcf7kqi6jd5uhu8mackoraid/22722990621.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/57cfe5018375a095c57ada2a143ebc28/53542012405.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=davinci+resolve+16+shortcuts+pdfPDF 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_off0000e4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B4 11104 bytes
SHA-256: 3ee3e3ced6c265c1e278b73d2c3e2afef29c4fe273966afba5f2a82c0a3b13ed
font_01_sfnt_off0000fe9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AE 17600 bytes
SHA-256: 33127707fd69b1a403abfa11be23f07e1e5422a0c43a7c88d701c5fa46d1c9aa

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