Malicious PDF — malware analysis report

Static analysis result for SHA-256 68386ebbf1d92cac…

MALICIOUS

PDF

65.1 KB Created: 2020-11-18 22:56:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 599d9ab50a89b2555757a7849adc919b SHA-1: bcb6e596b40e12639ac2034a0fb4f435b32f1dc6 SHA-256: 68386ebbf1d92cac7f5a4c392295455401171e1ba0490f47d7e73e4ae82e8bfa
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to PDF files hosted on various domains, suggesting a link farm or SEO spamming operation. One prominent URL, 'https://trafficel.ru/strik?utm_term=mapa+de+bruselas+metro', is directly embedded and likely serves as the primary lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://trafficel.ru/strik?utm_term=mapa+de+bruselas+metro PDF link annotation
    • https://vamewufu.weebly.com/uploads/1/3/4/3/134317042/wakolexabev.pdfIn PDF document text
    • https://fafexozoruxefok.weebly.com/uploads/1/3/4/5/134527426/kabekabiwo_boropikatep_gevig_mijup.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/gafajifinime-lavodefikav-dilutitibol-nogunajizanug.pdfIn PDF document text
    • https://saniwuladekogek.weebly.com/uploads/1/3/4/7/134759819/e54adc34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413462/normal_5fab10862d3cd.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/9373972.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/titan_fitness_equipment_quality.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/famous_people_from_new_jersey.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/watapitodika.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_off0000bfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE1 5252 bytes
SHA-256: 9530b0c660e18c7612a090d21605fbce205cc14453f63c64fb627f676280ab6c
font_01_sfnt_off0000d1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A9 11364 bytes
SHA-256: 827e7aee19e992ad52354af1471fc3daf4a04afdd1025756b9b35b23cd0b5136