Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe5feb8996d6750…

MALICIOUS

PDF

71.4 KB Created: 2020-12-16 21:55:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9f520f09b1cb9625eb0b2eacc19c1a7 SHA-1: 738c3323611cfe66cfe49c320b8f77b92fdee666 SHA-256: 4fe5feb8996d6750b793d64ee4fd0f5c4f80afc621e8ea8c445129691f57dc38
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URIs and the overall detection suggest an attempt to deliver a second-stage payload or phish credentials.

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://traffnew.ru/123?utm_term=portable+concrete+mixer+near+me
    • https://tokokurud.weebly.com/uploads/1/3/4/7/134744431/3808d987d18.pdf
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5f879bb2b7ef7.pdf
    • https://cdn-cms.f-static.net/uploads/4479214/normal_5fac00942d5e8.pdf
    • https://cdn-cms.f-static.net/uploads/4454546/normal_5fb4c9d1dc2a3.pdf
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f8c8237061ef.pdf
    • https://static.s123-cdn-static.com/uploads/4405638/normal_5fc45c8ddcab6.pdf
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f896409570fc.pdf
    • https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/saxilifubevosofoxiza.pdf
    • https://static.s123-cdn-static.com/uploads/4379610/normal_5fcdd6785e81c.pdf
    • https://menudobuwowewil.weebly.com/uploads/1/3/4/7/134765252/53026c4e.pdf
    • https://gunagabivap.weebly.com/uploads/1/3/4/8/134863042/teraxokusumumowazu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gupuso/betta_fish_breeding_guide.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_off0000dd25.bin
7326e2166b144a52446cde8df187aa8466b0338b0bd79f433d4b33781ad71c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD25 4976 bytes
font_01_sfnt_off0000edf9.bin
e3648c4e608a12b797cc0b65f7a324048e8e7d9265f483dd5fb0bf9900383003		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 10352 bytes

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