Malicious PDF — malware analysis report

Static analysis result for SHA-256 584c686e7b1ac00c…

MALICIOUS

PDF

74.0 KB Created: 2021-02-27 07:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 93797d5315d63eb452038267b081fe58 SHA-1: d1cc1d45c2c6bb18991ba7f3ae45b0ee068df197 SHA-256: 584c686e7b1ac00ccc3ca562d483235ec7c107c716c1ba7430bdd8b844ffd003
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains heuristics indicating it is a link farm designed to redirect users to malicious sites, and a specific heuristic flags it as a browser extension installation lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading malware or providing credentials. No scripts were extracted, but the embedded URLs point to suspicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://lozipotod.ru/strik?utm_term=used+coleman+powermate+5000+generator+prices PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408462/normal_600e5729bd044.pdfIn PDF document text
    • http://divuwon.iblogger.org/44020963405.pdfIn PDF document text
    • https://bugupomulu.weebly.com/uploads/1/3/5/3/135396692/4264473.pdfIn PDF document text
    • https://wapolamezabez.weebly.com/uploads/1/3/4/0/134041225/wojunusozolul-vuwoleb-pisewotitebolax.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/DgjgcGC/80021381193.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478134/normal_5fce1769477f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367283/normal_5ff0a2ddd3088.pdfIn PDF document text
    • http://mibajisokawetu.iblogger.org/68014371913.pdfIn PDF document text
    • https://lasasokuvob.weebly.com/uploads/1/3/1/6/131607269/2031d.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/zXT6Xii/final_fantasy_xiv_subscription_numbers.pdfIn PDF document text
    • http://rukakev.iblogger.org/bemevopovamenojalapuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_6026f693248b7.pdfIn PDF document text
    • http://memunokenifat.22web.org/thrill_of_the_chase_map.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/diiDjfl/faze_kaz_trickshot_map_code_1._0.pdfIn PDF document text
    • https://cdn.sqhk.co/javajadoj/idgfMZ6/free_download_farkle_dice_game.pdfIn PDF document text
    • https://togijiwasifuva.weebly.com/uploads/1/3/1/3/131398416/7808594.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479460/normal_60062f3b45b1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_600f18e4d250e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://solujenujaki.epizy.com/pukumewawelimom.pdfIn PDF document text
    • http://fezitovowikawof.epizy.com/whirlpool_water_softeners_manual.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_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 5744 bytes
SHA-256: d2b4d802c90569bf696e3a0ee8903a03a319fafc8f878f5c87ebf722b322c10f
font_01_sfnt_off0000f590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF590 10896 bytes
SHA-256: 013a12e1dab3d2d9cc567fca695ddfbc3e0e51aa113942de0ec1d3f626e36b0d