Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d93ca29f962b436…

MALICIOUS

PDF

77.3 KB Created: 2021-01-05 05:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5ae521df3794a39e3ffa82b4ff3027f7 SHA-1: ef005568ff2edb6cc34dce47a75dd2aff474cfcc SHA-256: 5d93ca29f962b4366ca021401bde47e70f495848a96cd4f18480984124eb7d1c
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 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malware. The document body itself is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/aws?utm_term=adobe+photoshop+premiere+elements+2018 In PDF document text
    • https://cdn.sqhk.co/savimatuv/juhejdN/empires_and_puzzles_guide_heroes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472768/normal_5fb36ceed434d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_5f989da0ee350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444655/normal_5fe1293d458ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f9e6e538cb7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458388/normal_5fbf09c646678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5fd5f3dfa51b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5f95b8aa75ccb.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/6abec8ce-6fd5-4a38-8def-f380113844d0/valod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ec1a9f-9de2-4d48-a47f-c6b570578d43/79578354337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893330c4-e091-49f6-afe3-4d138d4ffb7d/3078686393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf38ae60-f2b5-4149-9688-cb5bf3408170/dallas_cowboys_public_relations_department.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d958841-31bb-4d30-b285-347df610b676/67014877934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb60d20-321d-4ce1-8a29-c54d982aa22e/gta_v_apk_download_for_android_without_verification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9d58b8-3306-463b-9c57-cab077e3d806/tukidubepotuji.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_off0000f0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A6 5640 bytes
SHA-256: 96f56eafd1cd11c1495c410aa79ff6710022c0324f9b7ba2e8614c970f20c9b4
font_01_sfnt_off000103aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AA 10768 bytes
SHA-256: e99685fea284b95c1f01a481e95d84a64cf9edc9b86222165d0bfac93b696872

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