Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa94cb337991a7f…

MALICIOUS

PDF

75.6 KB Created: 2020-12-31 16:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 740406c0c30d1333b94a21aeeb2a944f SHA-1: 9d583be3322600e6fb00881a9e2b0fdc4e5ab786 SHA-256: 6aa94cb337991a7f8c72e13c3b3c7706484f735b9df350e95eba76b22c6413d1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML heuristics flag this as a phishing or malicious PDF. While no scripts were explicitly extracted, the PDF structure and link farm nature suggest it's designed to redirect users to malicious sites, potentially for phishing or malware distribution.

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://traffine.ru/strik?utm_term=rival+stars+horse+racing+desktop+edition+mods PDF link annotation
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/wulunamerogut-jafawaxuzisuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5fd11898b5eff.pdfIn PDF document text
    • https://cdn.sqhk.co/donewipimep/RTzdrSg/helicopter_crash_egypt_today.pdfIn PDF document text
    • https://xetebozeb.weebly.com/uploads/1/3/1/8/131872130/datow.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/vumadezuxelaver.pdfIn PDF document text
    • https://wukodotimage.weebly.com/uploads/1/3/4/4/134487216/4219604.pdfIn PDF document text
    • https://forakisoja.weebly.com/uploads/1/3/2/7/132740641/fe480e1.pdfIn PDF document text
    • https://wizejuxexena.weebly.com/uploads/1/3/4/6/134655833/6f305674c4ed4.pdfIn PDF document text
    • https://cdn.sqhk.co/tumozaraf/WKQjdgc/86795791783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478685/normal_5fbc9e6186d6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae31470-2bec-4a2d-a765-61bdf1b9fbd9/the_children_of_hurin_christopher_lee_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833a6315-5286-4652-9a9b-e97264c034ad/dragon_ball_z_bojack_unbound_full_movie_english_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc2b3e4-58dd-494e-9812-7a1a323ec0b2/daligidekerixotomolit.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/depends_on_terraform.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/sisajesimoxoxetofenopif.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_off0000e896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE896 5620 bytes
SHA-256: 1892f322cc60cc78c203d5055de47e7770c30e7473a68a03fb7e3ee6b5a91db0
font_01_sfnt_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 11172 bytes
SHA-256: ad82828ee79f00c8292c90aaf400639ebbcde1529bf9a861e14dfa047a5482c4

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