Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccdb9a8f4d915b9…

MALICIOUS

PDF

70.9 KB Created: 2020-11-22 05:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b805523adbd25acdfa02e9ba6024aa4 SHA-1: d120cec672cdf84c3f9d4b9c3fcce811bf980cd3 SHA-256: 6ccdb9a8f4d915b95a09669077db266b2dbc205eda3d7e200d79c828012a3c81
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely used to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to contain keywords related to 'antenna tower guide wires', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • 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://trafftec.ru/123?utm_term=antenna+tower+guide+wires
    • https://cdn-cms.f-static.net/uploads/4488806/normal_5fb77af5bc23e.pdf
    • https://cdn-cms.f-static.net/uploads/4460449/normal_5fa77c893598a.pdf
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5fb8392c5caec.pdf
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5f99ed7e6ef72.pdf
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5fb5e567edd5b.pdf
    • https://cdn-cms.f-static.net/uploads/4448750/normal_5fabe5e60cca0.pdf
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f879ab316246.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zowejunef/blaze_wizard_3rd_job_advancement_guide.pdf
    • https://uploads.strikinglycdn.com/files/5a01ba51-f612-414d-859d-a6d14b00e115/84654185146.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_off0000d9f6.bin
42bfdd0764659b11935066ef8968f9c7a6c629f3123fa8a01981cba8e67c9936		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 5044 bytes
font_01_sfnt_off0000eb3c.bin
441826a760cf1bb855b606fbab935555b5feb87bb0be73042023baa7d36bb9fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 10620 bytes

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