Malicious PDF — malware analysis report

Static analysis result for SHA-256 005207d81a5d5cde…

MALICIOUS

PDF

75.5 KB Created: 2021-02-08 04:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 4eb6cd885663e94ab55f0440573eed64 SHA-1: 5fe0091fcc9b94367e2bf32563a70b7a82acd1bf SHA-256: 005207d81a5d5cde9255e2d2cea5baeb07dd190a24de739426289705635c8878
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/shook?utm_term=word+search+puzzles+maker In PDF document text
    • http://shoop-fm.ru/little_alchemist_2_how_to_make_timepfgaj.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/QehaA3r/43712540314.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/fUvcdgQ/83626666876.pdfIn PDF document text
    • https://vatikaleme.weebly.com/uploads/1/3/5/3/135386674/wasirituteter_wipugotalinox_kerimegitodep_monasakogasagew.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/hqhiDCr/flights_to_denver_colorado.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/jdUGXig/world_cup_qualifiers_2002_concacaf.pdfIn PDF document text
    • https://cdn.sqhk.co/rotogogoji/PjfvihZ/tolabawukunogefokasevi.pdfIn PDF document text
    • http://spain50off.info/vigoxubixufefofanm0g.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/gcMhbOS/top_rechargeable_hearing_aids.pdfIn PDF document text
    • http://lenudes.com/beat_the_boss_4_cheats72nhe.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/DNQheje/siren_head_printable_coloring_pages.pdfIn PDF document text
    • https://zudomizat.weebly.com/uploads/1/3/5/3/135308615/koxawupobeko.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/33a819.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/turip/2019_fantasy_football_draft_day_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/sezuzijafofemitelaj.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/android_studio_emulator_wifi_no_internet.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/sulevaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/metal_gear_solid_2_pc_reddit.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_off0000e821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 5440 bytes
SHA-256: 507b911f79ebab2d6e7dc253f4bb67c0fdf5b12c04d6701c002caafceac68006
font_01_sfnt_off0000fa8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 11552 bytes
SHA-256: 3ffe1922c1fd486ac9063eb8099081b25750cb244b4e92258f82b2be5cf8b9f5

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