Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0cf558bd04e8a6…

MALICIOUS

PDF

63.4 KB Created: 2020-12-23 00:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 49bc58a0ee3e54efd2ec807c3ab6308e SHA-1: d589d8b58015c6eec8ac516333808a8f5d7a41a8 SHA-256: 2c0cf558bd04e8a66e76227aee825e9965f8bdf89d56efeaeaf8457c0baea66b
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://trafffe.ru/strik?utm_term=stickman+and+gun+3+zombie+shooter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492575/normal_5fe0a88a0b5ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_5fa10ead52a1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482872/normal_5fc00d15e78ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fab6884c502b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/budget_app_android_source_code.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0efc3b8467722f1d478d1/t/5fc13d1ce6d49a06bbbf41b1/1606499618013/international_encyclopedia_of_the_social__behavioral_sciences_2nd_edition_volume_4.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/canon_pixma_mx922_manual_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/rezawuremuwugemome.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17edd6609fd0ee7958e2c/t/5fcf772369d6d06d554202b6/1607431983125/xenurifewumak.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/venobinu.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_off0000ba9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9F 5844 bytes
SHA-256: ef3f81b6d43fb0d8f32574b67297961b6f6620860418c8b1f7b8e081d3bbf0c9
font_01_sfnt_off0000ce5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5F 10148 bytes
SHA-256: 7de0ac6ba3655014a60146303a4086219df2358d59791910c06acb32634fe5a3