Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd2672f3264fd2b…

MALICIOUS

PDF

69.9 KB Created: 2021-02-20 00:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 85badae10b0d2c977706dc105895c9c7 SHA-1: f2e86eed910e3b422321a0bfd20128b3b4198256 SHA-256: 7cd2672f3264fd2b74cede76b07630441a31e91ba1d94c4024bffae461d090ef
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://wuzezabor.weebly.com/uploads/1/3/1/4/131438899/7761708.pdf.
  • 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://leonvi.ru/123?utm_term=what+does+the+book+night+symbolize PDF link annotation
    • https://cdn.sqhk.co/vunalogivefu/idgisLP/29275941507.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5fe2954dc9807.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/Zje3Bie/netflix_movies_september_2020_vulture.pdfIn PDF document text
    • https://cdn.sqhk.co/gazejuruni/igP5r2E/3d_basketball_games_free_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/OhjLbAR/countryballs_memes_em_portugues.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/wlDjfjg/the_trails_apartments_nashville.pdfIn PDF document text
    • https://wuzezabor.weebly.com/uploads/1/3/1/4/131438899/7761708.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/aLjblhd/pacman_xon_game_free_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_600e78af60888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_602866568245e.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/gchfp48/bottle_jump_flip_2020_3d_model.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vepisesilutez.epizy.com/79466266092.pdfIn PDF document text
    • http://nowotaresumoti.epizy.com/what_is_not_a_characteristic_of_management_accounting_information.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/pajaduvalalagapivajozogem.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/asteron_insurance_change_of_adviser_form.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_off0000d412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD412 5512 bytes
SHA-256: a6939ee09dfcba192af0ffcde2f038d29fae34856624d301dc114c0d5fa86cd7
font_01_sfnt_off0000e6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 10608 bytes
SHA-256: b3dfad8a7037bb74d0c963d566bafb71478a16e27e29e0286dbc2c2731b748b0

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