Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3cbec6f70f41366…

MALICIOUS

PDF

70.5 KB Created: 2020-12-10 23:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 11372d2e085be4a53b2729c9a381ec08 SHA-1: ec508d7582e3644d71daadc11b9ad94e309d3bb2 SHA-256: e3cbec6f70f41366aeda791a978c46be889ed5d2415326ac644baab3bfac850e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one to 'traffset.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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/aws?utm_term=bollywood+movies+in+english+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454677/normal_5fb6888030b73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_5faa03ddd8650.pdfIn PDF document text
    • https://timitadenemegi.weebly.com/uploads/1/3/4/7/134728598/tisofeso.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/57848465-064f-4678-bf34-6b8e7224b814/xogipomaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1773d759-ef90-4ced-a26e-2789e533928f/pathfinder_unwitting_ally.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aaf6006-18aa-4c18-b57f-587f54aa82ef/star_wars_dnd_5e_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8c631d-e2bc-4fa2-889d-23e7763046c5/lil_durk_brothers_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/64404872922.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_off0000d28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28E 5332 bytes
SHA-256: be50c30429974f47ccb2047c549cd369c58af4d7c6b6916cd85aae11925d5fa4
font_01_sfnt_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 11876 bytes
SHA-256: bef2b60fa95159edaea51f1fca8c82d45c84f90f1bed7a9f800015546462a21f