Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2965c384ee02aea…

MALICIOUS

PDF

67.1 KB Created: 2020-11-25 15:24:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9942300235a4946b61014016c369096 SHA-1: 1b0a1150b9c9cd03615bed0eaf5ec581bc260c49 SHA-256: d2965c384ee02aea2b463ec67d02a6d9f9d4816563c0a5b45c11665f7007ecfd
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary external URIs, 'https://trafftec.ru/strik?utm_term=new+trucks+with+manual+transmission+2020', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=new+trucks+with+manual+transmission+2020
    • https://nifazupu.weebly.com/uploads/1/3/4/5/134507595/6244206.pdf
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/8507179.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuxadol/buenos_aires_mapa_turistico.pdf
    • https://uploads.strikinglycdn.com/files/a22b9e91-8fda-4385-9c31-628a298ace86/13172720743.pdf
    • https://s3.amazonaws.com/numegubowalonan/purple_dragon_knight_5e_build.pdf
    • https://uploads.strikinglycdn.com/files/2a69b9f1-3e85-4092-92df-4199e179c9eb/sojado.pdf
    • https://uploads.strikinglycdn.com/files/14a68bea-a16b-4898-a170-1481038c518d/kitsound_boombar_pairing_instruction.pdf
    • https://s3.amazonaws.com/jasadavebaga/jonerubiporod.pdf
    • https://s3.amazonaws.com/kewakuko/nutritional_information_honey_wheat_bread.pdf
    • https://s3.amazonaws.com/wilugugo/xegabizuwapubonoz.pdf
    • https://uploads.strikinglycdn.com/files/19ca77c6-ccc3-4160-b7c2-d25fcc6449b6/48651365172.pdf
    • https://s3.amazonaws.com/tetazino/79409447722.pdf
    • https://s3.amazonaws.com/nitatotol/exercicios_sobre_capacitores.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca8d.bin
b572fc04a573048d0cc176a92b59ba0e46f16c42529a1220ba49cc0bce81d854
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8D 5436 bytes
font_01_sfnt_off0000dcf7.bin
e347f24ac71dbd347af98b27f812688e21061c9b24088d74b13bfe601f27d7f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 10220 bytes