Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc11697e226308f…

MALICIOUS

PDF

68.2 KB Created: 2020-12-21 05:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0b30f1c453dec108649d487d6ed14c2d SHA-1: bf83ccd66bc6687e8bd801263217a62d0959c71e SHA-256: 0bc11697e226308f46c4bd016a68b057a933fbbd58b5c3a614d8c5ec3c732fa7
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://cctraff.ru/123?utm_term=campbell+hausfeld+1750+psi+electric+pressure+washer+manual'. This URL is known to be associated with malicious activity. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be corrupted or heavily obfuscated, but the presence of the malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

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
  • 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://cctraff.ru/123?utm_term=campbell+hausfeld+1750+psi+electric+pressure+washer+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f95517170ee9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422147/normal_5fb6e0d5b4100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5fa9e26c78005.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/78710b6e-40a0-4886-818c-ddb0e7cc92ae/ninagadiwinimuwuropus.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/ina_needle_roller_thrust_bearing_catalogue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8dfc04-e19d-4995-99d9-8bce64060ecc/instalar_moodle_en_xampp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975747a5-07a5-4bb2-b549-51e50fcc99db/dead_cells_wall_jump_rune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa33fa26-8df9-4f85-b049-92297bb31455/jiwudobiwolobeliduxejuri.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/kexalubavetukovozegamaril.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/after_effects_transform_mask_to_shape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bf87d7-a32e-42ed-b5b7-b14f0572cdda/anglo_saxon_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f526939e-c3db-4bc7-9ee4-431a3c96647d/50632560981.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_off0000cbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF5 5928 bytes
SHA-256: 07975f327286938b7830af9eb36a3d6686fd727683077bde7fd86922871cc6e6
font_01_sfnt_off0000e007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE007 10456 bytes
SHA-256: c1937a6eabc5ba14197796795769a4faa745e51d80f0af5b67fdedcad4e1df31

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