Malicious PDF — malware analysis report

Static analysis result for SHA-256 328bd151ee7e1208…

MALICIOUS

PDF

170.7 KB Created: 2020-12-30 11:03:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 26193be190903a05c42faadfab855956 SHA-1: 583d436d9d97bba6d20750f8e6fd0f034b0ccfd9 SHA-256: 328bd151ee7e12088071cdb76be4f4c3bee251b35764bc6450df86d849b10736
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a known malicious redirector. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to deceive the user into clicking the link, which is further supported by the ML classifier's high confidence score. The document's metadata indicates it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://traffine.ru/123?utm_term=contract+outline+law+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4496577/normal_5fe7edbb45638.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/7076005.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463006/normal_5fe1882a3d800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f8b3e99a3b3a.pdfIn PDF document text
    • https://cdn.sqhk.co/sukijubese/vX3jgge/gimudonasetetexaxami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5f975485a32c2.pdfIn PDF document text
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/sasukolezenox.pdfIn PDF document text
    • https://cdn.sqhk.co/vivutazawi/JayBpic/pinball_museum_las_vegas_closing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460241/normal_5fe99f7c1c703.pdfIn PDF document text
    • https://cdn.sqhk.co/wepenujofow/kCidijT/zakuduza.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c0103a-ac3f-4948-90d5-3aed65371b3a/pelebedusadox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bedcdcf-bce3-4b0d-8fe1-c5db7e0e13d0/dovudelitunirekuseditidap.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25AFE 1684 bytes
SHA-256: 51fdace8bd53b7d2e6af2c0ab3a57c298b99a0f760d42a36c32010743562cd6d
font_01_sfnt_off00026362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26362 4884 bytes
SHA-256: 64ce7b71d55565554c97e9f87398b69f8eb7c16069559e9171007edd3075441e
font_02_sfnt_off00027401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27401 11992 bytes
SHA-256: 2b089a242f92c6c3e8a5ba871d3d403aa69f26b2a1bb0013732ed4bbae324c08

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