Malicious PDF — malware analysis report

Static analysis result for SHA-256 d542935219472a64…

MALICIOUS

PDF

73.3 KB Created: 2020-12-22 07:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8ca1badf74bf41e09004dd0401b55f0d SHA-1: 8be596c851994bcd146fa3ae42e2c7eeb588cc2f SHA-256: d542935219472a64cb865089d4ba5ad58d16d9b58ba0fa113c394c67e0e80c20
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. The primary URL, 'https://trafffi.ru/123?utm_term=master+airbrush+g22+manual', is suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing a secondary payload.

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
  • 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.
  • 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://trafffi.ru/123?utm_term=master+airbrush+g22+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8a495a27126.pdfIn PDF document text
    • https://muvisodujop.weebly.com/uploads/1/3/4/3/134358588/1782817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462985/normal_5fb25b5d4bbff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f9c746e982b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5fad34f5af2e6.pdfIn PDF document text
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/4750270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f9ae7ec68c33.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://s3.amazonaws.com/gupuso/44986095157.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/pdf_atkins_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/aliens_love_underpants.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/16277793569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d496014f-a702-4774-8e69-6bf74bdf7428/9563236190.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/fewutepirugawakudute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a77e212-ebe8-4701-83ec-f0e18b880044/4th_and_goal_2018_unblocked_55.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_off0000d615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD615 5148 bytes
SHA-256: e551e0c8bc81f530b178258a87a955cd8987f98b49fd212594796c652c7391d8
font_01_sfnt_off0000e76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76A 10012 bytes
SHA-256: 124f9e6a5b18380a32e65b7f715af0dc2516a3fa4d09a1663196a35948ac9901
font_02_sfnt_off0001099e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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