Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be5135088f2cb84…

MALICIOUS

PDF

76.6 KB Created: 2021-02-15 10:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4697d1952edec30397b8430250169812 SHA-1: dabda5edb51678ff9e45ba785d6d45b4906c3591 SHA-256: 0be5135088f2cb844c0465a925ae12db0f3d233b51973cb1d2eb60bab2e0005b
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically a URL that appears to be a lure for downloading an old version of 'es file explorer apk'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure point towards an attempt to trick users into downloading a payload.

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://jacksth.ru/wix?keyword=es+file+explorer+apk+old+version PDF link annotation
    • https://cdn.sqhk.co/tumowara/hmggIhe/20418351477.pdfIn PDF document text
    • https://cdn.sqhk.co/punenekebi/irgfhhG/war_games_soundboard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_601297e2899ec.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/UUggp4F/lufopuxovadibimo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471995/normal_600b4804e774a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_6020b7b174c6f.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/bexeoVO/28133995340.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/x7gihe4/ruveratogevutalawuf.pdfIn PDF document text
    • https://cdn.sqhk.co/tudusiki/7Z0Ilji/remote_control_drone_price_200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_601a2d4d10d93.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/jjBYjg3/xerosajulizeverep.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/galinikagopit/45627084079.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/61817775877.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/vegas_pro_14_free_full.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/10161485757.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/instagram_followers_app_ios.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E7 5184 bytes
SHA-256: 0a8c871189ced532bb140122480f696f13f1aec2a0ee7f9a4d317e540fe86811
font_01_sfnt_off0000f7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A3 14716 bytes
SHA-256: 5dc6526269167b124b3ecd439f8f8f2e849c958238c4b6097173491f42543bd7

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