Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71a850774c8f4e9…

MALICIOUS

PDF

62.5 KB Created: 2020-12-22 04:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aab9b141fbd27558eeebf37b346af35f SHA-1: 136433f385da57b5bb687b98a01b31d3a55ba178 SHA-256: f71a850774c8f4e9f3c4a5f79b329331a8c658648583832445fe323a831a8cbf
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely part of a phishing or malware distribution chain. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its intended lure, but the presence of the external URI and the high risk score strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://traffset.ru/aws?utm_term=powerpoint+template+design+environment
    • https://static.s123-cdn-static.com/uploads/4367313/normal_5fcb53e3afee5.pdf
    • https://static.s123-cdn-static.com/uploads/4496380/normal_5fdcbcfd77988.pdf
    • https://webunufilijamo.weebly.com/uploads/1/3/4/6/134677486/bc484a2b59e.pdf
    • https://static.s123-cdn-static.com/uploads/4427284/normal_5fe1525c85834.pdf
    • https://xipasole.weebly.com/uploads/1/3/4/8/134853136/zifoguja_rizuku.pdf
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/5568107.pdf
    • https://cdn-cms.f-static.net/uploads/4484641/normal_5fb79f3a08a9a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juliziwojatige/kirixalegonuzofa.pdf
    • https://static1.squarespace.com/static/5fc011b424b06a7eb3fa7d30/t/5fce9f0cc2632f090abe3a2a/1607376652964/melumokaxen.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_off0000b68f.bin
f22672b90d7a3dd84a359d572682596b7bf800857be7f70fffc191f86a32b826		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB68F 5432 bytes
font_01_sfnt_off0000c90a.bin
8e110a2a6c4a1730cc7d5d237ff3f5ce7aeb927785dee46cb4c1b90bba2062b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC90A 11176 bytes

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