Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f69d463f0ee1bb…

MALICIOUS

PDF

65.1 KB Created: 2020-12-08 19:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3137a38967870bbf85e4bc5ab41c8456 SHA-1: daa82ea2218ea0a9f0940e8a860a1b1ca62370d6 SHA-256: f8f69d463f0ee1bbde8156c2491e0b378904b01ff614f27581f223c001be0076
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, which is characteristic of a link farm used to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffe.ru/strik?utm_term=rod+to+feet+converter PDF link annotation
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/069e458d6d2.pdfIn PDF document text
    • https://vuvajufuzuno.weebly.com/uploads/1/3/4/4/134480129/a8aa8c6a5a9e.pdfIn PDF document text
    • https://lelewubinuzuton.weebly.com/uploads/1/3/4/7/134771703/329d870b2934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_5f9a32685d115.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/61a1230ef59e7.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/bcb576e4.pdfIn PDF document text
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/lapuvibumop.pdfIn PDF document text
    • https://binegizid.weebly.com/uploads/1/3/4/7/134764074/jaxerolewebuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f9c51e0138bf.pdfIn PDF document text
    • https://rineragafuvotut.weebly.com/uploads/1/3/4/4/134442037/1859344.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/732eb9dc-575a-4c6b-ab4e-c07b8daa91b9/california_driver_handbook_spanish_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/language_files_12th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/jupozejibisadejewefara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ffc0b8-f70f-41a1-9942-bb14ce78bb17/paladin_vs_cleric_baldurs_gate.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_off0000c1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F8 4660 bytes
SHA-256: e7f4c097c2c3c9b60edde2e0316691485d8dd8f223c57553872c4c34fdf66d37
font_01_sfnt_off0000d1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F4 11160 bytes
SHA-256: 5fa4e8b48f5c150018bb2912a8c2973e1b6c42db673ff16151c2b01cbee0af25

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