Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06db64855e43adc…

MALICIOUS

PDF

76.2 KB Created: 2021-08-23 18:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 884cf5a7fb999f7834d7b252df89e896 SHA-1: 7209dce74dc3c45af10d37883c32908abb1a1344 SHA-256: d06db64855e43adc82536198fb8e486bef1264e3baf2fb0571c521b27f4216bf
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple external URLs, some pointing to compromised CMS upload storage, suggesting it's used to redirect users to malicious sites. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, indicating the document's primary function is to facilitate access to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6585

Heuristics 4

  • 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.
  • 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://huntic.ru/uplcv?utm_term=antenna+theory+by+balanis+2nd+edition+solution+manual+pdf PDF link annotation
    • https://tectrongim.com/uploads/files/gagadulasudiluvaz.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/t9cpcqddejjhiaf0e0qagbatn0/20460764268.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/lulili.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/65588046281.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16083733f7bce7---17440360236.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/9fe7b2484b838887bc1b76b8125d2a91/wopakomuji.pdfIn PDF document text

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