Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05a6ef03424f79e…

MALICIOUS

PDF

68.7 KB Created: 2020-11-26 06:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0fc454d5c4ac0a5abd7d749b3679b9b9 SHA-1: 2116c00bb981debe6cb6d7f243ab695ba0d0e2fb SHA-256: a05a6ef03424f79e9897c3c50d004d9f217b6ab8f8553e13feebbe8efb3e3eb8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=mike+o+kelly'. This URL is the primary indicator of malicious intent, suggesting a phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://traffmen.ru/strik?utm_term=mike+o+kelly In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_5f967e3d5f69c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383571/normal_5fadf333aa049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5fafade5aecd6.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/9fb1ef0c-49f8-4f5a-8ef6-d96ff80624e4/palm_beach_county_school_calendar_2019-20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62476e85-bb1f-4683-97a0-928d89660e88/34469847894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef025866-5c3f-40e3-a392-c77b7a168fa3/skyrim_mods_argonian_armor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70908c53-275b-43fc-b2d1-dcb1a6e8e9bf/68009158434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f28362-d95b-4b35-81e7-b735683a1830/26920252761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82214238-33da-4cfc-a468-30e274c88077/three_line_equal_sign_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1e5d23-9263-4298-be5b-80f5502f5456/23724928033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee9c2a28-a819-4acd-ad33-41c32513c47c/vex_on_tangled_shore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c8dbf6-8fcc-413f-a941-507a110cd5ab/61197283986.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_off0000d19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19A 4364 bytes
SHA-256: 456002efb42b1ac1058f4e2645c57d9d90cd4c9a521e812fb2d31c329111031c
font_01_sfnt_off0000e099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE099 10784 bytes
SHA-256: 0c609cb7cf1537bf3cc785895f0aeaecb4d6224d189ca321b54d0da36ae353f0

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