Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cc7fd5e4ab4391…

MALICIOUS

PDF

64.7 KB Created: 2021-06-10 22:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: aa65a2d102199922e2151e504d5ac8ea SHA-1: e9e3708179e0f4d28c46b57c83771431ac4b73a0 SHA-256: 97cc7fd5e4ab43915857ff085d5c73f0ccb5a0ce1f2b4f191022d8f1e8f2ecfb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to 'Dna structure and base pairing worksheet answer key', intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7653

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://cructi.ru/uplcv?utm_term=dna+structure+and+base+pairing+worksheet+answer+key PDF link annotation
    • http://kingalbertltd.com/uploadedfiles/file/27876903831.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/mdvtuv21tpus1ea0htrbdmh9a7/1821424274.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/0bcd7aa3cf728e463c10a4d0a39e23bb/10471439527.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/jixusujenabodetotiso.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/6cc79f6b98ee4f402fd6cc770b66e247/sisabivajarataxepik.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3016e2ba9---sabojofotu.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/5f6t916u90gfcrru35oqgtp69b/lovutaxino.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160992c50e41b4---50382406045.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/o36kebfrridmcvunis1mtanlj3/36012067385.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/mofabizad.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/dacac723097ca16410ea2c26fac4ec3e/46024863737.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/32932312853.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/v45p4rsqe1b5899qbm3tjlrk82/89405077053.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/8da2336870f45cff27cd80c8be18a219/fixifirukikamotuwepaja.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/fsim3c3dbvr1pcff7pl10ajp72/42750821942.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/rarimununigexina.pdfIn PDF document text

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