Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2996fa2176bef8…

MALICIOUS

PDF

74.5 KB Created: 2020-11-17 06:27:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 716177e485e784d4d096b952de3d5069 SHA-1: d51066cbbc07791bc1e749c80ed0cc2ca332638c SHA-256: 2c2996fa2176bef8219046dd2ffd361e9e0a2344c2d622a04916aff62e9b74a8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=ejemplo+de+bosquejo+corto'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body strongly suggests an attempt to lure the user to a harmful site, characteristic of phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=ejemplo+de+bosquejo+corto In PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_5fa5340013b25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_5fb3499dbb63f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389804/normal_5f91b0d2bcbe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_5fa6d96677c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_5f8fa8122bdce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_5f9da5b7b152f.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/a456be12-9575-4287-8864-e88d6507cb8e/53019621863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b193833d-bd6b-4596-bfd1-dc638311a6dc/51730602098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aca3edc-ef3f-4773-a792-6a99cd36ee00/22012433199.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/dowry_system_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/rekibedafowow/29467826617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4178042b-3332-451c-87ce-c9b37ee9d0e7/foririwonipajir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2782719d-9b6c-4b6a-a3ce-32ce481156c7/22211496908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a3aeff-d968-43b1-afbd-c97a16fa7ef3/pazatumesesax.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD945 5308 bytes
SHA-256: 74aed429c10f9e903fab58dfd6e1331de6d7e07c88c7cf7e2ddce40c318eed5d
font_01_sfnt_off0000eb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB37 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 11336 bytes
SHA-256: 419373698f5c8d18e51a8952c6d57fd70ce2abb3dbed31afc3a8f50cb2788a0f

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