Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0e60522865c96f…

MALICIOUS

PDF

69.7 KB Created: 2021-06-07 09:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6da33d25fe18c1fecec4e676bd316ae4 SHA-1: 6fe3eac2152aab877ea0509410cda7df16107339 SHA-256: 1c0e60522865c96f2535cc950c7b1c673651a4419f72d89b7e5315a248f2b80d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be related to technical calculations, likely a pretext to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9588

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://irlanc.ru/uplcv?utm_term=3+phase+transformer+core+size+calculation
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16078e8ca26a42---kisarixewujoxile.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/ba14aa370d2aaac7707a916033b8ab68/ruwetimonupawubof.pdf
    • http://artospace.com/pics/file/fevexamituxakubiziz.pdf
    • https://shoppingplanet.ro/ckfinder/userfiles/files/27676000224.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/971495d083ee06774fc9aa2e21016291/60960348104.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/f9f010c74a50a5e91886081067560e61/82419424746.pdf
    • https://prairieroseclothiers.com/FCKeditor/file/pizowerifile.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/977b86v3bnn8k2hcfo9qsbrd2g/54437288222.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdfe568127---97237672738.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609d12f9adb08---vipuzonubegamowime.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce15945dfb---jagolelefejofaxiwebopixex.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/fge7gnqj7fjmvsv914msnfmb5a/katop.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608140b206650---9245492168.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9aaba5d32---39452754018.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd39cd7721c---75967408222.pdf
    • https://fibaquitaine.fr/cebatrama/userfiles/files/24862147109.pdf
    • http://clinicaveterinariabilancino.it/userfiles/files/kowubitapiwonugup.pdf

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