Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe326a37523e6f60…

MALICIOUS

PDF

78.6 KB Created: 2021-03-19 00:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3039a31cd99faa5703b6c9e8c5baa15d SHA-1: 8735e15c5d65d315020c7e46fd9dce8b7b91e27a SHA-256: fe326a37523e6f6046e9c245fe393d33b7829119dc74fd21f62f2f652d1a9bf8
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=hunger+games+book+series+summary
    • https://lorufolirosob.weebly.com/uploads/1/3/4/5/134584190/146271.pdf
    • https://zoludapi.weebly.com/uploads/1/3/4/5/134528767/7418356.pdf
    • https://cdn-cms.f-static.net/uploads/4370284/normal_600b2cb1b9b3e.pdf
    • https://cdn-cms.f-static.net/uploads/4392877/normal_6023c545adab9.pdf
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/surularivenut_xidogababola_pugakudag_mametewaxoj.pdf
    • https://static.s123-cdn-static.com/uploads/4492555/normal_5fe55644f1520.pdf
    • http://helen-art.ru/volume_of_pyramid_worksheetk54jk.pdf
    • http://tdsevsvet.ru/tipos_de_cilindros_hidraulicos4o799.pdf
    • http://inmyshtangen.xyz/used_ford_f350_work_truck_for_salep5gao.pdf
    • http://2020coupons.info/virtual_girl_hd_live_wallpaper_for_androidcilsn.pdf
    • https://cdn.sqhk.co/takoxuwal/gcha6jj/japifenuvef.pdf
    • https://tufubigin.weebly.com/uploads/1/3/1/4/131453284/luveli.pdf
    • http://oneitshop.pro/minecraft_handbooks_onlineoryoh.pdf
    • http://kprovk.xyz/final_fantasy_explorers_dragoon_guidewp792.pdf
    • http://leree6.club/savusadt8968.pdf
    • http://onsideball.info/constitucion_dela_republica_bolivariana_de_venezuela_1999_articulo_109k7h96.pdf
    • https://dupukixulin.weebly.com/uploads/1/3/2/6/132681516/gukapidazaluwatixa.pdf
    • https://cdn.sqhk.co/tabakotodi/IUZhfic/24843450854.pdf
    • https://cdn-cms.f-static.net/uploads/4489717/normal_604d32fc5b946.pdf
    • https://static.s123-cdn-static.com/uploads/4393209/normal_5ffc0cf1b6871.pdf
    • https://cdn.sqhk.co/fewoxenovof/jgjh5sL/90626343407.pdf
    • http://allieshouseofhope.com/944920338000aju.pdf
    • https://static.s123-cdn-static.com/uploads/4426556/normal_6001169b245a5.pdf
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5fc79172cbaba.pdf
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fcba5397c2d5.pdf
    • http://boost-shop.xyz/what_are_the_rules_for_high_school_softballtghkr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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_off0000ea78.bin
5aee40941395c7b2e4a81aaa11b44223d634827547111df8a719c3bf80598dc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 5044 bytes
font_01_sfnt_off0000fb7d.bin
461c05b4f98d8deebb151fb4fb9d2a763cfc6fd2ab64e77430963116229d90f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 10412 bytes
font_02_sfnt_off00011ed6.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED6 4324 bytes

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