Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fe7c074c5bc94e…

MALICIOUS

PDF

76.3 KB Created: 2021-04-03 09:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0cabd6efdbe8d4335f0764add5c3506b SHA-1: 8bdffaf421b231ff620c4849812377e294565588 SHA-256: 04fe7c074c5bc94e100864a2951d64fbd7ba7e915e85b3ce8ec760bc9677e41f
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=twilight+2008+full+movie+free+download+mp4 PDF link annotation
    • http://digitalcalakk1.xyz/dibal_h_structure9qolx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_60353bcd1b32d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_604bb6cda4d04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367680/normal_5fca338414d13.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/cjgf9hb/subway_train_surfers_run_games_temple.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481821/normal_6004860bd2ee4.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/uigvgiP/xamuvejuzedenarepixefok.pdfIn PDF document text
    • http://top-agent.ru/how_to_hook_up_hp_envy_4500_printer_to_wifiu68zo.pdfIn PDF document text
    • http://boost-shop.xyz/autocad_2017_gratis_italiano_completozdnjl.pdfIn PDF document text
    • http://balifruit.com/alarm_clock_2_mac_downloadg8qqk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_600ebc3c0c190.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijazulebok.epizy.com/cultura_chachapoyas_arquitectura.pdfIn PDF document text
    • http://difatatufoze.rf.gd/9270467487.pdfIn PDF document text
    • http://mopafanimuwez.epizy.com/82375147326.pdfIn PDF document text
    • http://kitivej.epizy.com/lamiberofiwu.pdfIn PDF document text
    • http://juvofirodeburu.epizy.com/approaches_in_teaching_english.pdfIn PDF document text
    • http://roxeruteruda.epizy.com/20367596956.pdfIn PDF document text
    • http://nolapejaselijak.epizy.com/medical_office_manager_job_description.pdfIn PDF document text
    • http://lonuduvikis.epizy.com/sidati.pdfIn PDF document text
    • http://pagovogezafub.rf.gd/demographic_information_form.pdfIn PDF document text
    • http://niwajes.rf.gd/denenimujojuwozov.pdfIn PDF document text
    • http://xadupozitolewoj.epizy.com/editable_50th_birthday_invitation_templates_free.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_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 5932 bytes
SHA-256: 4be8a1523dca1151e6d7b7440117ad8d459691e225c96a7b554a18e08f5a8a88
font_01_sfnt_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 10748 bytes
SHA-256: 8221b27aaf716f7f6a6b1a6480a042d96bc7643e4b6a55f482702db3a5078c0f

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