Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a67a6967f92a8c…

MALICIOUS

PDF

47.6 KB Created: 2021-06-23 22:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7a928660f2291a1597f00c49f51c2c06 SHA-1: 4769f0c9a91a66fd6d0aad88858734c84dd238ce SHA-256: 80a67a6967f92a8c297a38610a78b1ee1e2e667c66b7951148c8e14746b0b822
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms and appear to be part of a link farm. ClamAV detected this file as a phishing trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7338

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 http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16075e9a4c0223---92028557191.pdf In PDF document text
    • http://chalappuram.com/userfiles/file/foxow.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160bb961960bfc---vobukunadajikowefak.pdfIn PDF document text
    • https://nestuby.com/userfiles/file/tupojobijekifiruzes.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/pikedafip.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/wanatazekumamivifetejelex.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/gs07klmuo2gmctnb463lesa0vv/wazenabokenebidegitok.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa30da9cbf---negesazigurilol.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607965e6dc456---libugodexalijetes.pdfIn PDF document text
    • http://juentai.com/userfiles/files/pifubufane.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46851f119f---xewekobirugebipegoxe.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/36210316553.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/64243276499.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d4cfea702---petogujukivezuviwobixeraz.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160840227d0bb7---32722849046.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8be3ece5a---batilofudixon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=exercises+simple+past+verb+to+bePDF link annotation

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