Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2aa9786216ddc4b…

MALICIOUS

PDF

73.3 KB Created: 2021-05-05 15:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 714f6f6e61e284255fe66da643720dae SHA-1: 7418b58b26f61a946b85a09819128e2ef0b07f07 SHA-256: c2aa9786216ddc4b3cb00214ceabae6bd569e451a3619fe795b1d610d1102ba2
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=wow+temple+of+sethraliss+location PDF link annotation
    • http://wide-mean.top/927309386593lakm.pdfIn PDF document text
    • http://kupiokno.su/datawamegimigopipeoo0fe.pdfIn PDF document text
    • http://bravos-kids.ru/232549577630ph6e.pdfIn PDF document text
    • http://rankingcoach-apps.com/introduction_to_marine_biologyxji2f.pdfIn PDF document text
    • http://sayseedokg.com/how_to_fit_a_vinyl_stickerybjqz.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/fadupazageraf/48473321546.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/handoff_report_patient_safety.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/performance_assessment_tools_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/mafidojusupomubejokomawuk.pdfIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_1c99350f01394dd88261a0b0ac76fb8e.pdf?index=trueIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_1224884a89284a9d90a2139da02a9657.pdf?index=trueIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_2f4e64567ad24fcdaa0b64ec7cca2772.pdf?index=trueIn 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_off0000e040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE040 5360 bytes
SHA-256: 02e3ac0abf79fd96c29b076fe46f268e9b8d5318655c089a4d9a50e56ebf3944
font_01_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 11192 bytes
SHA-256: 9af8dea53364b0fcb3e52708dd73bb09bb47ab313ecefd097333aa1662eb9a9e

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