Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7958075ebe82ee…

MALICIOUS

PDF

72.5 KB Created: 2020-11-20 00:04:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2efda4e08d8c11a2f5158066fc5d95f SHA-1: 49208497b3b7bc14974bbc3f91d9f6a36f81b69a SHA-256: ca7958075ebe82eebe62a226e5212a73bb22703782923bc1fd33f62d17a7a315
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffine.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=how+to+spin+a+pencil+continuously
    • https://cdn-cms.f-static.net/uploads/4461250/normal_5fb6eb377c7ea.pdf
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f91753fa4455.pdf
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f8ddf95eb4f0.pdf
    • https://cdn-cms.f-static.net/uploads/4380700/normal_5fb3ef9e5bb88.pdf
    • https://cdn-cms.f-static.net/uploads/4375352/normal_5f9dd6a525333.pdf
    • https://cdn-cms.f-static.net/uploads/4379987/normal_5f8cab6d98e56.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dinilederu/11161705372.pdf
    • https://s3.amazonaws.com/jajoxulabojaso/earn_to_die_2012_part_2_on_unblocked_66_games.pdf
    • https://uploads.strikinglycdn.com/files/70425975-ad11-4995-b902-fa6af7601b5c/lasibutobupojafinazo.pdf
    • https://s3.amazonaws.com/potevip/37734117346.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/35886048763.pdf
    • https://uploads.strikinglycdn.com/files/bd0ed4bf-5eb3-4670-b2f7-5d0a4e576723/wowhead_mechagon_guide.pdf
    • https://s3.amazonaws.com/zaxuledo/inferences_worksheet_10.pdf
    • https://uploads.strikinglycdn.com/files/9f78d7eb-8456-427b-a743-a321847c6f1b/mewadik.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_off0000e043.bin
2b51768006a2b41a64a4c86f25436b0d6942e5c0464ffc314bb4e50de4250cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE043 4984 bytes
font_01_sfnt_off0000f163.bin
7e78e28d962ade37ed627a7e548e7cce72bbae87c07c2145c5b2a8272944978b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF163 10400 bytes

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