Malicious PDF — malware analysis report

Static analysis result for SHA-256 7393ec760dadbcd7…

MALICIOUS

PDF

76.9 KB Created: 2021-03-04 06:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1c57551c7cda767240c8edeeab9557d8 SHA-1: d3ba77cd08f39928d6b069f1378683e04101f803 SHA-256: 7393ec760dadbcd7def39dab3409d3925161157161a44819314fcdc008e53aad
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external domains, many of which are hosted on disposable infrastructure. The document body, though heavily obfuscated, contains references to URLs that are likely part of this malicious infrastructure.

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://lozipotod.ru/123?utm_term=best+water+softener+salt+for+high+iron PDF link annotation
    • https://cdn.sqhk.co/figakeves/cPgcwjf/rexomugegezo.pdfIn PDF document text
    • http://yarrebitteh.online/astonishment_report_example2vejq.pdfIn PDF document text
    • http://micrometerdigital.xyz/be_here_now_book_ram_dasstdrgs.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/cwcjejd/battle_pass_helper_assistant.pdfIn PDF document text
    • http://wusokamojifel.scienceontheweb.net/snow_white_movie_grimm_brothers.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/jgxifJb/build_royale_games_unblocked.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/motomisudezukupalot.pdfIn PDF document text
    • http://soinjaga.ru/fufipamatofeludifuke25kz3.pdfIn PDF document text
    • http://wgathering.org/board_games_for_adults_groupsswwdc.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/bQcidQa/17662512265.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/cbjhMBV/geometry_wars_pc_download.pdfIn PDF document text
    • http://paypallsecurity.com/vulcan_pop_bubble_shooterpfs3n.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/lowrance_mark_4_hdi_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/nimawabej/gDCF1hd/us_army_stickman_rope_hero_counter_offroad_apk.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/2007_chevy_impala_ss_5.3_engine_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/zifudubojufowerewofaxuj.pdfIn PDF document text
    • http://navezep.epizy.com/3d_car_tuning_game.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 5172 bytes
SHA-256: 308b725b72ed282dcaf88f6640aff1a228e994371f01dfc63fe4c9f5cbd6568e
font_01_sfnt_off0001024c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024C 10716 bytes
SHA-256: c50050f5e86178577fae1e73930ad4a3bd6081c81de8039e590f559cc38a8080

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