Malicious PDF — malware analysis report

Static analysis result for SHA-256 036074ff2ccc1f40…

MALICIOUS

PDF

78.2 KB Created: 2020-12-28 21:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5dd425b38f9085abd8ee1eccfc654998 SHA-1: 764242b25cd565cc945240be1d49af3c0dd62e39 SHA-256: 036074ff2ccc1f40ced870065d9ff3e8eb357911693b9fea1dd3d35503414573
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs pointing to various domains, many of which are hosted on disposable platforms like Weebly. One critical heuristic indicates a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or redirecting users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://gettraff.ru/strik?utm_term=warhammer+40+000+space+wolf+gameplay In PDF document text
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/4076474.pdfIn PDF document text
    • https://gojulujowavid.weebly.com/uploads/1/3/4/8/134886085/jomema-lusisim-mefasewokonugu.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/ae327760746.pdfIn PDF document text
    • https://sonefuvik.weebly.com/uploads/1/3/4/3/134325549/6758584.pdfIn PDF document text
    • https://nanagimub.weebly.com/uploads/1/3/4/6/134632235/biluxa_napagiw_boxenim.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/HOjeYji/mutuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/Sxr41ig/simple_graphic_design_portfolio_websites.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/puvoxopowiwupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a3b33346-3415-4c53-9b6c-1681d8a5ad31/32636167829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc288dd7-07d5-40a5-95c8-d65067aac6f7/zevepovuvesal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/addc2657-f3e5-44db-8bf6-132920dd937e/44449523074.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F5 5420 bytes
SHA-256: f72cc17219ce444d958b88b520be3b1b5315770611b036b37fd75486343be8df
font_01_sfnt_off0000f782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF782 11488 bytes
SHA-256: 782767d2e931769cd9ffbe91bea4756ebca3044f6c2356df0adc7ff7549d3deb
font_02_sfnt_off00011e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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