Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca69ac9ecb697dd5…

MALICIOUS

PDF

73.2 KB Created: 2020-12-21 11:09:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 827dab19839356d14ec1074faf6a040c SHA-1: d2d875a0d89cdf68856e44efea73e173042adcca SHA-256: ca69ac9ecb697dd525db1c580bebbc40694bf7376e1c5acd94ebb325ac942b6a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'traffset.ru', which is a strong indicator of phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=smartness+attitude+quotes
    • https://static.s123-cdn-static.com/uploads/4387586/normal_5fdcc8411b9f5.pdf
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5fa9b38ee902d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3c2ecc3c-8d26-494c-ab62-d2b35b3d6039/gerber_legendary_blades_durendal.pdf
    • https://uploads.strikinglycdn.com/files/123f4fec-749b-45cd-86bc-6345385d12c5/vejonejadadejavegiku.pdf
    • https://s3.amazonaws.com/vuraradaso/microsoft_access_database_templates_inventory.pdf
    • https://uploads.strikinglycdn.com/files/8be7dc1f-8e4a-4de6-b605-8e266de5d5c9/76984608567.pdf
    • https://static1.squarespace.com/static/5fc0f88bd26ff1194f740ef3/t/5fc34fed9ee0f32b87bd6ef2/1606635502080/kabumula.pdf
    • https://uploads.strikinglycdn.com/files/7b291356-d24f-4864-8ad0-8bc3be8efe1a/89610694057.pdf
    • https://s3.amazonaws.com/wujapu/six_sigma_prioritization_matrix_template.pdf
    • https://s3.amazonaws.com/fenatagazise/database_systems_design_implementation_and_management.pdf
    • https://uploads.strikinglycdn.com/files/07908492-b406-4ccd-a379-e640a8c3662d/pavevidekofijenevixeja.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c6.bin
a143e8c9c7c6a7581458de431b34dc12440a401d1bb5ab0e72754905b3d2bac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C6 5168 bytes
font_01_sfnt_off0000f438.bin
7fe4f160c4fda32258dbf68499061040fddf2aef5b29801fc84f55662c98e434		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 10700 bytes

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