Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e42acf2bdfcbe4a…

MALICIOUS

PDF

75.5 KB Created: 2021-02-27 03:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5943f7a5238e507c6c5770878cddc4eb SHA-1: 7db40d5bfdb7d41e795d61360801b0c8e3e640e0 SHA-256: 4e42acf2bdfcbe4a1627bcfeec47a12f782364cfdfcb4809649a1bc7a5977bf2
66 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains numerous external URLs, many hosted on disposable domains or link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically. No scripts were extracted, but the presence of numerous external links points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://seumenha.ru/strik?utm_term=can+you+put+your+own+songs+on+beat+saber PDF link annotation
    • https://cdn.sqhk.co/zikegasenar/fhiXjfk/zudogazabikojab.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/WPqO9dq/46027418134.pdfIn PDF document text
    • https://matomuzunoto.weebly.com/uploads/1/3/5/3/135389802/vaxurenakesaxu_pegetabazovako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456379/normal_602d91c52588c.pdfIn PDF document text
    • https://mezufimuvuleto.weebly.com/uploads/1/3/4/0/134016906/jilofozez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420248/normal_5fd918464ff64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5fefb56f0bf8a.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/004935b6b.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/gfK6hdJ/my_sky_mobile_deals.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/gcjj46W/super_one_more_jump_steam.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/ef622f38.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/how_to_heal_your_emotional_pain.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465537/normal_5fc5b981ce09e.pdfIn PDF document text
    • https://gumopokexu.weebly.com/uploads/1/3/0/8/130814161/6054029.pdfIn PDF document text
    • https://balikawe.weebly.com/uploads/1/3/4/6/134659528/zumomijev-rilemezefat-bugigimib.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/1351849.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE0 5192 bytes
SHA-256: 3b771b12f9c1cfa4139a2a91429d71a5dc4c5d3ff7d140ebf15a634fd0846f63
font_01_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 3580 bytes
SHA-256: 1a7cf2e83877735866d08e7e17e278ad1d568114bbb25c1529d31d8bb264bb05
font_02_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 10768 bytes
SHA-256: 775d02f0d559fea9473eac92a169f70ec25ef6944aac61d4220bb390d647be16

Open this report in the interactive analyzer, or submit your own file for analysis.