Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e9ec7283b7a498…

MALICIOUS

PDF

48.4 KB Created: 2021-06-10 22:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 774ed25de397bbe55d98a026b245c95b SHA-1: 0dc99d95adeb3e4d92928906b56c29b8f9e6741d SHA-256: 15e9ec7283b7a4985559436b8f43917912ee8d1565fe47cfd68c79e1f99d411e
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 0.7228

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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