Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f7279711a9b418…

MALICIOUS

PDF

65.6 KB Created: 2020-12-19 05:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89338bc52492d4684bab7759f44f685a SHA-1: 1f89fedfa5377b2c13904d8297dc2a930ea63e00 SHA-256: 72f7279711a9b4181060cefc63f19e8c27beefdc189aef922695f407e131b4ad
184 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://gettraff.ru/strik?utm_term=dewalt+scroll+saw+for+sale', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Dewalt scroll saw for sale', suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?utm_term=dewalt+scroll+saw+for+sale
    • https://static.s123-cdn-static.com/uploads/4454550/normal_5fc6c75ea3b77.pdf
    • https://kupasaxep.weebly.com/uploads/1/3/4/4/134432663/8a86ee35.pdf
    • https://cdn-cms.f-static.net/uploads/4421615/normal_5fdaacd51d722.pdf
    • https://sevivuninuk.weebly.com/uploads/1/3/4/4/134459749/3902112.pdf
    • https://cdn-cms.f-static.net/uploads/4486036/normal_5fb8d3fa8d1b8.pdf
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.pdf
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/2796375.pdf
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/69a4a9f8c2c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bupesejirijejus/bubble_letter_font_photoshop.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0376cc750a3b5a070c2b/1606222710613/16565184527.pdf
    • https://s3.amazonaws.com/janodojivi/avinash_dixit_games_of_strategy.pdf
    • https://s3.amazonaws.com/rizijubovapuk/mario_benedetti_poemas_no_te_rindas.pdf
    • https://s3.amazonaws.com/tixeligufokup/wordpress_forms_to_google_sheets.pdf
    • https://s3.amazonaws.com/sinadi/geometry_dash_2.1_full_mod_apk.pdf
    • https://s3.amazonaws.com/jedadokuti/fractional_exponents_worksheet.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c0a2dd96f5918e4e847/1606372363481/zexurozufikunidiror.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_off0000c32c.bin
2e4de7f4221bb2f2ebfb6e637428e76b93499eda1d67c3dba5d336f849b3340d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC32C 4964 bytes
font_01_sfnt_off0000d432.bin
86fc8c02c6d91e8fb459a2e70908a75178bb158fc2221aec83e77d799532cbae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD432 10884 bytes

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