Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7aab058cc94db1…

MALICIOUS

PDF

70.2 KB Created: 2021-09-12 11:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c22ea363c449cd0d0c137d173180f6b SHA-1: b38a784b460791d3daf432eba7678d015d1b3d72 SHA-256: ac7aab058cc94db1c898c5f2d57da4e0a9b294a401f4562ee13a65833b03c6b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous URLs pointing to various domains, some of which are hosted on compromised CMS platforms, suggesting an attempt to distribute malicious content or conduct phishing. The PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8329

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=500+greatest+albums+of+all+time+list+pdf
    • http://gamax-motor.cz/data/dokumenty/sapowikexexipas.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/18a63ed11c38740f477704cb240c6236/45314016843.pdf
    • https://f2h63c2.ip4secure.net/upload/files/gadewetanotaf.pdf
    • https://coffeetuanvang.com/Images_upload/files/kijakaxote.pdf
    • http://adance0112.com/upfile/editor/file/54275966532.pdf
    • http://cyclad.org/UserFiles/file/10903636476.pdf
    • http://royalrep.com/userfiles/files/gimupigogoretedupisanisa.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161374eebe4035---setam.pdf
    • http://wakabaeducation.com/userfiles/file/89736605155.pdf
    • http://cheniou.handysociality.com/upload/files/rorev.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b24a8825d7---wolegojatadasufusiw.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c8d9c6ce9---fumax.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16131052bece2a---36479943353.pdf
    • http://otczenacts.com/media/files/kurunaneg.pdf
    • http://wwm-quanta.com/upload/files/13471926106.pdf

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