Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf28e31282f4a597…

MALICIOUS

PDF

62.0 KB Created: 2020-12-17 10:30:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4a2be07c38fe2e69521aba0d7e8f724e SHA-1: c2b3724cf62d8facc6f64c661199542a690cb50d SHA-256: cf28e31282f4a59772ffadfb84a87f30cc0d10a5cd5ebf715f2377a81044233b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=proscan+tv+remote+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422659/normal_5f9d4f3a92f3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_5f97e9d3e67fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5f8891b7b8faa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_5fd9387540b92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_5fbcd2e12f70b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f8a078ac476a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5f8b0a67ab089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_5f8ec05adeaf3.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/6820bff3-52a6-4057-a013-d197aae181b5/multi_story_building.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc9420e-24f8-4caa-af00-0b3adb7ff04b/wilmar_floor_jack_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/crash_fever_suyang_guide.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_off0000b7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C0 5004 bytes
SHA-256: 2428fbe0a97377483ead778ede9c1bb1340d31e99ef1f51bee44f07cbadb6af8
font_01_sfnt_off0000c8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B4 10376 bytes
SHA-256: 3dcfa2fa0922fd64745fde0d039d73e6c68859190a019c5358aed85558bf0061

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