Malicious PDF — malware analysis report

Static analysis result for SHA-256 c627f15590597997…

MALICIOUS

PDF

76.9 KB Created: 2021-02-02 06:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6a8190e3a000fcb0e81aaf8507392e9f SHA-1: 4b89276d586a55871fa714bb2c97fa27e95243b7 SHA-256: c627f15590597997bc99aa3cbb64972a15589768a96cb80d42b3b3566c078653
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jacksth.ru/aws?utm_term=cfr+report+form PDF link annotation
    • https://cdn.sqhk.co/koxopumo/Y96FppU/nigobano.pdfIn PDF document text
    • http://profapp.pro/mesin_linting_rokok_manual3786p.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/MhiggeR/xebezozunid.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/KgfjgDT/okay_good_night_voice.pdfIn PDF document text
    • https://cdn.sqhk.co/vofudejobif/D6Hgjji/zombie_island_scooby_doo.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/jYDZiic/word_bound_free_word_puzzle_games.pdfIn PDF document text
    • http://pimuxiv.22web.org/chava_marathi_book_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/b4NyhjR/wings_financial_credit_union_customer_service.pdfIn PDF document text
    • http://tehnikator.ru/a_cosmology_of_monsters_book_reviewlmxg3.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/gjqQa30/highway_traffic_car_game_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498404/normal_5ff27fceacde1.pdfIn PDF document text
    • http://vafutixon.22web.org/ownership_structure_corporate_governance_and_firm_performance.pdfIn PDF document text
    • http://nature-ital.space/766982124171p5ji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422145/normal_5fcbe77e8b81e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guxudapese.epizy.com/dugux.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_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 4532 bytes
SHA-256: 6422c2985b9a21b58b0b94473f06dfc939ab4a5a1734264c01a4fb132c42105f
font_01_sfnt_off0000ff1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 11828 bytes
SHA-256: 59eadfd2d9da1bdd91a1f64e46b861106a727cb63913097c2205d88638b5b781