Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f156d9deae808c4…

MALICIOUS

PDF

79.4 KB Created: 2021-02-13 06:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 05e5a484140e0584db635fd2060d27ee SHA-1: 866bb830da759803bf90fcd10d3013b4a121745a SHA-256: 4f156d9deae808c42388f19a43d5481af60f042d940764c4d88c6a9cd406623f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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=quad+squad+scandal In PDF document text
    • https://cdn.sqhk.co/rizakumer/ibXieh3/manunijenamalerukere.pdfIn PDF document text
    • http://nutigunejome.22web.org/70666722000.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/bFhaggE/92317377611.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/ifjfieD/72790036652.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369516/normal_5fefa758f3f74.pdfIn PDF document text
    • https://cdn.sqhk.co/joxopejufito/0oibhjJ/open_houses_today_plymouth_mn.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/eifheSt/escape_the_spooky_haunted_mansion_in_roblox.pdfIn PDF document text
    • http://islta.fun/giwovopisub29fc0.pdfIn PDF document text
    • http://small-italy.space/gekanetugekexerujelitup3dmsw.pdfIn PDF document text
    • http://reduslimitaly-official.website/karojumogewotebafevubujdn2op.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489241/normal_5ffa1a9dece61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452377/normal_5ff0e04f0b69b.pdfIn PDF document text
    • http://nukicew.xyz/harbourvest_global_private_equity_factsheett09ci.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasilew.epizy.com/bicarbonate_ion_formal_charge.pdfIn PDF document text
    • http://fegozijagomon.rf.gd/weremukutuviwa.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_off0000f7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 5024 bytes
SHA-256: 1b24f0320e864abf70ead5ca40e32a2c2b5148dc001695060a0b39342171bbe4
font_01_sfnt_off0001090d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 11496 bytes
SHA-256: 07e22a76299276ab1725f309e11067b10a22f8475952bcff32d8b7295349f99e