Malicious PDF — malware analysis report

Static analysis result for SHA-256 02de537899dcf54d…

MALICIOUS

PDF

84.9 KB Created: 2021-02-28 12:24:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c3384b961c52ace4d9d73e118ef7964 SHA-1: 5627a456ce2f5c23f55d1c8d6ae39031e2f00c15 SHA-256: 02de537899dcf54d476ed4447a08a56ac20809aa10f7af1aaa68d82626d76134
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating a phishing or malicious link distribution intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=golden+tate+fantasy+outlook
    • https://cdn-cms.f-static.net/uploads/4464313/normal_5fe74f0940572.pdf
    • https://cdn.sqhk.co/buganisazobu/d8jglji/zezinefilobitigagovom.pdf
    • https://cdn-cms.f-static.net/uploads/4484154/normal_5fe85cf09db15.pdf
    • https://cdn.sqhk.co/zofizitene/w4mid3j/hot_wheels_unlimited_game_release_date.pdf
    • https://depewezuluro.weebly.com/uploads/1/3/4/1/134108544/wadagelo-lesezedopodaki-velirazure-nirulug.pdf
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/d5d6db0a.pdf
    • https://cdn-cms.f-static.net/uploads/4403404/normal_600f280e55a43.pdf
    • https://cdn.sqhk.co/malofavu/igTAjhF/free_things_to_do_around_me_today.pdf
    • https://cdn.sqhk.co/dowufagit/UghjivA/fnaf_vr_help_wanted_song_by_jt_music.pdf
    • https://cdn.sqhk.co/mopomotop/OLR1gi2/ixl_sign_in_bboed.pdf
    • https://vekoduxiboba.weebly.com/uploads/1/3/1/3/131398498/5176597.pdf
    • https://cdn.sqhk.co/redusebi/ejidZhe/wood_block_crafts_ideas.pdf
    • https://cdn.sqhk.co/sorubajuzoxe/hjsJiff/diy_light_up_full_length_mirror.pdf
    • https://static.s123-cdn-static.com/uploads/4418972/normal_60004b609b916.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zifozujiwi/videoder_14._1_mod_apk.pdf
    • https://s3.amazonaws.com/xapijifas/habitual_buying_behavior.pdf
    • https://s3.amazonaws.com/zubata/us_passport_online_application.pdf
    • https://s3.amazonaws.com/sazomo/74456972559.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/fujonavisik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100c2.bin
002444bb4ffb23a22684db65f5f6941bfdad2ec4fc4d73324185beaba1435364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100C2 4836 bytes
font_01_sfnt_off0001115d.bin
2599d61d43081cc6c40a6579d8795b538e6af420f82993f34eb102ce9ba26bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1115D 11260 bytes
font_02_sfnt_off000137db.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137DB 4324 bytes

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