Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1194152a5234e1f…

MALICIOUS

PDF

77.6 KB Created: 2021-04-07 07:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cba33179d0ca05f2349770abd94822bd SHA-1: 7768a94b2056b58ad04e9a975c65900546377292 SHA-256: d1194152a5234e1fa66c665c0a82421653e1509c8f3eb4a822f56b1effb774e4
166 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and a specific rule for advance-fee scam lures. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the heuristics strongly indicate a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://baarspo.ru/123?utm_term=crash+bandicoot+rom+epsxe+android
    • https://static.s123-cdn-static.com/uploads/4365619/normal_5fee0d930870f.pdf
    • https://cdn.sqhk.co/gufuluzibos/jj8jcgg/roller_hockey_teams_near_me.pdf
    • http://retamos.mygamesonline.org/access_control_list_configuration.pdf
    • http://konanozopesan.22web.org/2012_buick_regal_repair_manual.pdf
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/34ea9b5b7.pdf
    • http://fiwupejebibogu.sportsontheweb.net/advanced_wing_chun.pdf
    • https://tataberoxem.weebly.com/uploads/1/3/0/8/130874397/4244823.pdf
    • http://heleogose.online/19547375209l1aoq.pdf
    • https://cdn.sqhk.co/reriwoduriju/fXjd60a/vodukagoxowub.pdf
    • https://cdn.sqhk.co/gefimiwotux/ouV2gcv/darus.pdf
    • https://cdn.sqhk.co/beledufe/MoJtihy/alchemy_game_walkthrough.pdf
    • http://pressit.fun/zinawaretaxemabujatepq4ux8.pdf
    • http://zumbayuliya.online/consumer_journey_powerpoint_templatej99rh.pdf
    • http://center-san.ru/fopobud9vi.pdf
    • http://shop-profildoors.ru/81070326926cnim.pdf
    • https://cdn-cms.f-static.net/uploads/4453900/normal_602aa84467b9a.pdf
    • https://cdn.sqhk.co/movumatoz/FFbtjjf/buy_ice_hockey_table_game.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jiporeve.epizy.com/rurupebepatanuzisoxasul.pdf
    • http://tixenolas.epizy.com/106739865.pdf
    • http://ruronegiseko.atwebpages.com/fluvial_geomorphology_book.pdf
    • http://petetilazuji.epizy.com/charles_kittel_introduction_to_solid_state_physics_eighth_edition.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f24b.bin
fbb9948583188cd44abfcda84cd1b4ec585358dcda57da1eda933cb9c137be3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF24B 5392 bytes
font_01_sfnt_off0001046d.bin
2e22d5ee10bf168fa831314f1a26527b779f4042f741951f5c4611b7210503ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1046D 10608 bytes

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