Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2be3a0e243d5bc4…

MALICIOUS

PDF

70.7 KB Created: 2021-06-09 18:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7cd4a9a040337a5eea16b65ee0d96c3f SHA-1: 092205c3b1aa96ab694887a06df581daa997a903 SHA-256: f2be3a0e243d5bc43687e7976de4bc3adf4751aedb9b8c5645d15d828e40184f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics identified the PDF as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of embedded URLs further supports the attack pattern of luring users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://laborke.ru/uplcv?utm_term=simon+vs+the+homosapien+agenda PDF link annotation
    • https://vishalahospitality.com/ckfinder/userfiles/files/62252986693.pdfIn PDF document text
    • http://amdind.com/userfiles/file/gitadeduzet.pdfIn PDF document text
    • http://kme-kme.cz/files/file/woxosi.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/2ce8vh56mivuljp8q3gjfhetrn/devomogoz.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/83446307822.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/tisenivomuwewabup.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/wafur.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/fb55ed14d1810e62561301a23d14f84a/5506245220.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/48deb106200a647b55359ef191f7dd85/judatetedaveju.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7875c51c2a6dda476386fc090e299b8d/73005656314.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/464b661f30d57f9f91d850775ddaca33/24586420784.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad89c36e5f3---21656708184.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/9e1ec37e51ccd3a47f9ddfc35003a3c6/82426680459.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/93f850c95d076173e05c6e7e218eac2b/gumumi.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/8a8fa865c4eb669525185425419ce112/kujededopopafu.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/73495ce97d38f9bd088e242ea94ec520/zovesesekemefutotinegoru.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3299571f5d0e672cfb2eeab0395a6334/93498324588.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A2 5408 bytes
SHA-256: fc28c3d512ed1d750fd840bed1d70eecfd2343e37dad22ec2b066c9e26ce68fe
font_01_sfnt_off0000f2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EA 12520 bytes
SHA-256: 45c47802d9b94810bab29b1c2981dbe19d07b0e8031decdedf57ae6006cd5b1c

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