Malicious PDF — malware analysis report

Static analysis result for SHA-256 af4dd26700a79f03…

MALICIOUS

PDF

67.1 KB Created: 2020-12-24 10:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6cb3b6fd8eb4a30d07d504b0de2e03cf SHA-1: 5cc679e1b1ed233e336be051b9d6795303f60bca SHA-256: af4dd26700a79f03e78f6612c4c72ee8af69b3390b0f8839875236795eed6155
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The heuristic PDF_SEO_LINK_FARM and the embedded URL pointing to 'traffset.ru' strongly suggest a malicious intent to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=running+dog+harness PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f96c66b44fbe.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/ibhdPha/princess_mary_marriage_in_trouble.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456132/normal_5faf8bda84428.pdfIn PDF document text
    • https://cdn.sqhk.co/mokavokaven/I8jiD8f/wizz_air_fleet_plan.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/UiFajcX/10829765146.pdfIn PDF document text
    • https://cdn.sqhk.co/xisiwuba/hdEgfhe/goat_simulator_free_pc_no_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408195/normal_5f9a67e593a2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418171/normal_5fc0d037efb48.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/regegozumekoza/shell_shockers_redeem_codes_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/extech_chlorine_meter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/chief_keef_glotoven.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_off0000c9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A5 5064 bytes
SHA-256: 0db02f5655e1b7365a11d3480f4099c342cf8ea7337a99179cfd69d033c6675a
font_01_sfnt_off0000dadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADB 10984 bytes
SHA-256: fd55bea914a2e4c15a6fa016789a3f27238896905593ac09edc69ef501884655

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