Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4180fabc62c9e2…

MALICIOUS

PDF

68.2 KB Created: 2020-11-20 16:13:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2785e0377e9b791de6312657e6d1154e SHA-1: 54084da985bbd716e32d3f43b966df0f154078a1 SHA-256: 7c4180fabc62c9e2fe64af81969a54ea09e21fed7a10cc539f2efc93157e6725
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs, specifically 'https://traffset.ru/123?utm_term=big+fish+tackle+utah', suggests a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful 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://traffset.ru/123?utm_term=big+fish+tackle+utah
    • https://wofixoxabovu.weebly.com/uploads/1/3/4/5/134524794/7547408.pdf
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5fb7912e4feaf.pdf
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/3798231.pdf
    • https://cdn-cms.f-static.net/uploads/4418557/normal_5f9696b12cf51.pdf
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f8e08fbbe3d9.pdf
    • https://cdn-cms.f-static.net/uploads/4451028/normal_5faae364db108.pdf
    • https://bepewosub.weebly.com/uploads/1/3/4/4/134445398/zarapod.pdf
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f9c6b21cc988.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rikolesafuwofar/verbo_accendere_passato_remoto_forma_passiva.pdf
    • https://s3.amazonaws.com/pazifetanegapu/capital_budgeting_techniques_formulas.pdf
    • https://s3.amazonaws.com/subud/tic_tac_toe_java_lab.pdf
    • https://s3.amazonaws.com/dezajok/lodetutibigotib.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_off0000ce3d.bin
be3aa8866f737aefdc2917cdb451963e94ccc0c697a5abeb5743331d21dac6bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3D 5160 bytes
font_01_sfnt_off0000dfde.bin
5c78ab8c461d6392aba8ca5731a0fbdd5b32c80a8fbcef13c5b642647459c70e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDE 10536 bytes

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