Malicious PDF — malware analysis report

Static analysis result for SHA-256 79724a0a06515faa…

MALICIOUS

PDF

68.4 KB Created: 2020-11-26 09:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7ebb4452cd7745e26692d5c99abaadb9 SHA-1: a3d76d107db32f7f8f483192f10056ac6f333ea1 SHA-256: 79724a0a06515faafbe6a567b30fbf2e1b607c2037d15cd4cd32fcabc180ce0a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Super cat heroes'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=super+cat+heroes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f8735868cfbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5f95af68d0b74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_5fa80c5cbbcf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5fb2dea1b8103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447087/normal_5fbec7d52371c.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/fexuror/wowozenixukekewazitazuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/51849561435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43888927-b99e-4a6a-bd01-3470806fc561/skin_resource_md_cosmeceuticals.pdfIn PDF document text
    • https://s3.amazonaws.com/rotafasaniz/ridexoduzevupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b38d68-96ca-424e-a332-d487e15751de/mastery_charter_school_uniform_polic.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_off0000d118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD118 5092 bytes
SHA-256: 6326afcfc0045873e18c65c3c33dd2a6845dc0a1aec66f187c67d91a9c4a9e28
font_01_sfnt_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 10340 bytes
SHA-256: 25f2e2a52bd37f48bc00552cfb5022043362deb5268711bdd11cbb6d55b998fd

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