Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27fd260d14c3ade…

MALICIOUS

PDF

39.1 KB Created: 2021-09-06 13:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f0e76746c7babb1ce656a663eb95b850 SHA-1: 0cc4a4ace4a6d5403c3235a65b141942a9cb165d SHA-256: a27fd260d14c3adeb00b583f8ff3883f319da33ef5578c5c504282fae8f0c260
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_IMAGE_LURE' indicates the document likely presents a full-page screenshot to obscure a clickable element, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://garglob.ru/uplcv?utm_term=pdf+yi+worde+%C3%A7evirme+program%C4%B1+t%C3%BCrk%C3%A7e PDF link annotation
    • http://1000projects.ru/upload_picture/file/72491851395.pdfIn PDF document text
    • https://brod-plovdiv.com/images/72522528536.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/83668362388.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/nojetamuzo.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/351928f7ebe98137927fa82437da58be/rugisomufoxobo.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/deferirebo.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607014637433f---77913269096.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/fibavesalazuvaxewinum.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/68075949393.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/sodixuxojanofufijukoj.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a462ae6e0---39627954191.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/207667483260c8878212438.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/danipagowetexago.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd91d4778f---96858535989.pdfIn PDF document text
    • http://acril.ru/ufiles/files/zofitasi.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/64825500378.pdfIn PDF document text

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