Malicious PDF — malware analysis report

Static analysis result for SHA-256 365a5087a621f50e…

MALICIOUS

PDF

68.9 KB Created: 2021-04-11 07:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7de335eda672678d5e3458111276ac10 SHA-1: 1ffef0a018f67284ae25e54f44feb56b9567e55d SHA-256: 365a5087a621f50e6122b87c880e442a5e8ae4b3120cc3c9180cfe62a58d607d
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains references to 'Gears of War crack reddit', suggesting a lure to trick users into downloading malicious files. The presence of numerous external URIs, including a link farm on disposable hosting, further supports this attack pattern. No scripts were extracted, but the PDF structure and external links point towards exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=gears+of+war+crack+reddit PDF link annotation
    • http://kugaraginoja.mypressonline.com/pelibuwemu.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/61196430009.pdfIn PDF document text
    • http://hookup153.site/sims_4_big_sister_challenge9en8n.pdfIn PDF document text
    • https://tijirurilulade.weebly.com/uploads/1/3/4/3/134312421/dafodexofal_tepuvenipovefu_jukajar_patejexow.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/Pchfygd/bingo_nights_glasgow.pdfIn PDF document text
    • http://smartline58.ru/cartoon_character_drawing_tutorialuxyxd.pdfIn PDF document text
    • http://kafidovomiguvo.mywebcommunity.org/arabsat_frequency.pdfIn PDF document text
    • http://tegubija.mypressonline.com/good_reader_android.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/IdSTgdK/zagiro.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/igqf3EP/bee_craft_boats_for_sale.pdfIn PDF document text
    • https://rixikevepu.weebly.com/uploads/1/3/1/4/131408169/wakebakoxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mikazigeta.epizy.com/detroit_become_human_marcus_piano_sheet_music.pdfIn PDF document text
    • http://xafepabofi.epizy.com/4745653409.pdfIn PDF document text
    • http://noxumalog.onlinewebshop.net/70759957563.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/agile_pm_agile_project_management_handbook_v2.pdfIn PDF document text
    • http://dafawesag.epizy.com/akh_lad_jave_song_lyrics_free.pdfIn PDF document text
    • http://getorimojaz.rf.gd/ek_chumma_song_hd_video.pdfIn PDF document text
    • http://gemakeruw.epizy.com/48961682439.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/how_to_fit_an_integrated_headset.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_off0000d0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F2 5172 bytes
SHA-256: 7c994586e8fb6d9d72ee2745f2faab374887021e6fd4f047ae4bdce5c5331359
font_01_sfnt_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 10440 bytes
SHA-256: 64ad78ea944205c56ca251d9e0fdea84e6c19fe9d293511174d17ae36d4ffb12

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