Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef07f1652170ea56…

MALICIOUS

PDF

84.2 KB Created: 2021-02-27 22:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: f84111b346d318ac9ea1839cfa11aba1 SHA-1: 54c5ed33f49263bb8ef4a745e0a087636cf5e257 SHA-256: ef07f1652170ea565c6aad0d64ad79a78ef922bdb85123e921e2e2b41fd76fe3
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that, when visited, likely leads to a phishing or malware download page. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

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://vilenefex.ru/wb?keyword=what%20is%20the%20value%20of%20r%20universal%20gas%20constant PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495042/normal_5fd671da4a89f.pdfIn PDF document text
    • http://ultra0.space/68224336981ucfx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485004/normal_5febb40c659d6.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/mUUjhea/nidifiw.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/jduZw3i/70851945453.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415930/normal_5fc736d595ea7.pdfIn PDF document text
    • http://trastqort.online/gexofegujofuzujovefil9t52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482872/normal_60127ae185bb4.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/bf0Qihg/five_below_las_vegas_hiring.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473640/normal_5fe08be22d8fa.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/jorumumewozx6td.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/cjhJ6VH/run_runner_bird.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/zatasipezeg/jasper_ireport_5._6._0.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/346430768.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 2912 bytes
SHA-256: 8b511c58d3234fa9e6ad089c95d1dc2bd0b31f87be7a4d6a8849fccc4da5c7d6
font_01_sfnt_off0001054a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054A 5216 bytes
SHA-256: c548baed3c7bd2f4ec52f888348a361a175245423a4db6f7f7526a5a3dc2f015
font_02_sfnt_off00011719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11719 13700 bytes
SHA-256: e880d8b3074136fa9f8ad71b628a2f63f81b7da92a4669ff861fbfc896a10789