Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9a36a356f4b275…

MALICIOUS

PDF

73.6 KB Created: 2021-02-20 06:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6b5b499134e17decde1a5c59e53b7c5a SHA-1: e4f0a320844b5ad8f21b7d8a04b0da2ade02086f SHA-256: 3d9a36a356f4b27533c39bbad68cb15091a82956e508aac5736a0f968b53036a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://seumenha.ru/strik?utm_term=what+specs+do+you+need+to+play+wow PDF link annotation
    • https://cdn.sqhk.co/bewewojiwo/ichf4gi/the_chosen_casting_call_2020_utah.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381531/normal_6004ea6eb6ed4.pdfIn PDF document text
    • http://vizit.store/gafodakiritenodanuvinuml7cga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470027/normal_5fdf293ec3367.pdfIn PDF document text
    • http://bodyita.space/45440714469mmqhh.pdfIn PDF document text
    • https://wipowoniwosixad.weebly.com/uploads/1/3/0/7/130740259/bujivozu.pdfIn PDF document text
    • https://cdn.sqhk.co/dudilirugido/aIPZheO/closest_old_national_bank_near_me.pdfIn PDF document text
    • http://tb-films.ru/fegemupikubiwidoriresdybp.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/egizhcf/innocent_warrior_lyrics.pdfIn PDF document text
    • http://smartcoin.design/refesurepadoxet82o9.pdfIn PDF document text
    • https://cdn.sqhk.co/wiparodub/Kij6icF/56725936522.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/ieiiEge/dixomorapevonon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417321/normal_60190762ea507.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/jakmjia/vonelikigerux.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/djbghye/safasijobamuvitemavosiwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407756/normal_5fcb6f9bb41d4.pdfIn PDF document text
    • https://kogexabisuzim.weebly.com/uploads/1/3/4/3/134322867/baed797.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/AghtuuH/perfect_piano_guys_notes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobaman.epizy.com/eye_of_the_beholder_game.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE221 5272 bytes
SHA-256: 6c90d00e394cef5ad985454427994c28067ab7f9d6df9c91caaf1f686a872a21
font_01_sfnt_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 10924 bytes
SHA-256: 36dfe1d9747d517133f8db454e07fd4afa30dfdbbc7b0d972eb2ba330f8e7e9a

Open this report in the interactive analyzer, or submit your own file for analysis.