Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4b5bcc869bcf9a…

MALICIOUS

PDF

93.2 KB Created: 2021-04-01 04:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3ba67d3bf53d290ce29dd452339ceef6 SHA-1: f89f8943f7c1b516e4a27bbbc0efad851afef163 SHA-256: bf4b5bcc869bcf9a6630f4fcc732f7a57a4f3ca91c840d3df4421d3ee348ada8
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/wix?keyword=2013+mack+truck+owners+manual PDF link annotation
    • http://datekal.22web.org/tolamir.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/j6whfQy/gonemad_music_player_android_auto.pdfIn PDF document text
    • https://cdn.sqhk.co/gukovafax/kw6Torc/30513032994.pdfIn PDF document text
    • http://rokoxuj.iblogger.org/safevunapabigagiwadevasu.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/jlthfhj/uber_driver_support_number_without_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_6018d9163255b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365607/normal_5fc660c115065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_60497a8561835.pdfIn PDF document text
    • https://cdn.sqhk.co/vovawumusa/bidhgOR/lofodusuvigovuru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479905/normal_5fdcdcf6e92fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446774/normal_5ffc94c9a4502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5fd310e6bf937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391319/normal_602c362225b03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_60642f60539f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_6011796fd8738.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/hhhggeA/bodujatozibaz.pdfIn 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/a67e186f-268d-46ae-82d6-6675c26cdfcc/nothing_else_matters_bass_tab_guitar_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91f4af6-8aac-4ae4-a256-bcef3d0a8826/definition_of_public_relations_in_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce17130-0ce9-4317-904e-3e381301532c/vatupavijop.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5F 5496 bytes
SHA-256: 0b8b74b81bcb1168f92176a470cbd59fae548e5fd78710118ab5a867d568d02e
font_01_sfnt_off00013f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0E 12448 bytes
SHA-256: 2bd73bb03e9459eb7bb7986465cfabe3e988d3897086f937636f54cd5311dd30

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