Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89181d5c7c66b5c…

MALICIOUS

PDF

67.2 KB Created: 2020-11-13 01:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f3c7229c691ab5c46363e402d488962e SHA-1: 1633be1d6c35d3709613eddef081a730590045bc SHA-256: a89181d5c7c66b5cb5d4f737cdf4164b2388f0b2209d1c37311f58fb9063912a
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=warrenton+grade+school+spring+break In PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/3c3ef3d045c5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450151/normal_5fa330ec46472.pdfIn PDF document text
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/jotasivob_jukasifa_mexugi.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/duxujapif_jumepolifi_luzilarumezo_zomiduxevow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f99d9dc69368.pdfIn PDF document text
    • https://wukemurorafol.weebly.com/uploads/1/3/4/3/134338373/dakixefidu_losetolewa_sujemesinur_wizixakogi.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/f79d4374-2f3c-4fd1-b094-ce09e04d0b98/notario_publico_services_bucerias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5308310c-c935-4117-a93e-fbe87387c1b4/puzexaxabifabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da299a08-7ebe-4b42-bd84-3323a9f2d969/75248244047.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_off0000c5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DA 5552 bytes
SHA-256: b7d54a2add442baeaa507de2c045dee012cfbc85b74a6dd96cb93badff687399
font_01_sfnt_off0000d8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 11868 bytes
SHA-256: a075a537b28b2295f923da045e3fb96155d7e70d12dd8ddf564fddf282e17a33