Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9454ac9f5edd97…

MALICIOUS

PDF

71.3 KB Created: 2021-03-05 00:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7846b43c5b2e693fe2d45f119c2d141b SHA-1: 171707a8109bd68b4749ad91f9fcca2b9edc9a68 SHA-256: bd9454ac9f5edd978f0c37fddcf0c71f39c1a4378bac03720d655ca05e40b271
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/award?keyword=easy+crochet+baby+afghan+patterns+for+beginners PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489244/normal_5ff96d8619b17.pdfIn PDF document text
    • https://dunomomavelow.weebly.com/uploads/1/3/1/4/131407267/dezadetatugur_buzemozozede.pdfIn PDF document text
    • http://interbankdigital.com/bulletproof_coffee_diet_booktvn6v.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/what_is_the_order_of_the_books_of_the_bible_chronologically.pdfIn PDF document text
    • https://supokiroxuleniv.weebly.com/uploads/1/3/1/6/131606692/1657989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387706/normal_601ec8a058b07.pdfIn PDF document text
    • https://budorezaru.weebly.com/uploads/1/3/4/8/134859022/4474423.pdfIn PDF document text
    • http://my-favshop.online/vekolavijadiravirokizujugpoenu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459162/normal_5ff9c10311d66.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/wolaledogapitinovafay1rc0.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/djlifpj/sivuxudax.pdfIn PDF document text
    • http://baranaydin.org/year_of_the_dragon_philip_sparke1hl7e.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/wave_speed_physics_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/Emagfgd/monster_high_monster_maker_app_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499329/normal_5fe4462164c05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370541/normal_5fcbde83b5ea6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_09b52cf61fa04a48af9358529db5a7cf.pdf?index=trueIn PDF document text
    • http://wobanunep.myartsonline.com/bobcat_zero_turn_mower_deck_belt_diagram.pdfIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_3ad5ac5d30bd47b3918d8cd38a5518f8.pdf?index=trueIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_284b4d7d7183475db656d259ae68a6b3.pdf?index=trueIn PDF document text
    • http://weparaxopulo.atwebpages.com/oscar_et_la_dame_rose_sparknotes.pdfIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_4dfb0063e3f943abb8d235a80217da34.pdf?index=trueIn PDF document text
    • http://weparaxopulo.atwebpages.com/los_crimenes_de_la_calle_morgue_libro.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_off0000d994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD994 5444 bytes
SHA-256: 998813605936fb67023441c4ba9ae7d2e56e5aacd2e7a0fb2e16200683af3d18
font_01_sfnt_off0000ec21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC21 10388 bytes
SHA-256: 94ae0eb85205df67bcdfc44fd0fe6523d38802e7ddd929548ad87eae9de8f592