Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8965ebf0ec778c1…

MALICIOUS

PDF

114.1 KB Created: 2020-11-18 08:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3994966832b4239417496e51e53e568e SHA-1: 936e733bab0770a4737f07a60f60aed1c37772ec SHA-256: b8965ebf0ec778c12dbd2a4f944bedcd2d91c13f15d177a5a14e28a9e1210699
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://gettraff.ru/123?utm_term=cold+steel+recon+scout+carbon+v'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=cold+steel+recon+scout+carbon+v In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5f91f24d4de51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f98be0580a9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_5f9823864cd9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_5faf148d5cc02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5fa6c6e2d51ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391620/normal_5f909e0a917c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8731aa72d38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f95da20d157c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f8933ec730b1.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/5d957b56-a543-4245-ae2b-63d6113882f0/duxobimadudoluvameluta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a1ab880-7efd-465f-993c-f7ef48182aa0/chromatic_scale_finger_chart_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c7b0cf-4cf9-4acf-b0e3-0b2bba2bccd6/59804307086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18342ecb-4fb3-46e5-9168-b366753b7736/pee_mak_phra_khanong_full_movie_eng_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c44587-bcec-4a2a-849a-399397277881/new_vegas_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad47f300-8d8e-4487-a50c-64fd9583475d/bupotolelaroburogobu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001665a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1665A 5036 bytes
SHA-256: 46a3a55e05531c700620f044f435ed57c4fe9f7dada1c1005b04b4ded18413aa
font_01_sfnt_off00017784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17784 10816 bytes
SHA-256: 94e5369098b7e94e0dfc1ff65523421c06e3296bcf6f219a0c5ae3bec000ddda
font_02_sfnt_off00019c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C83 18984 bytes
SHA-256: 4417dd6e2e6c99839644d9656f4d587458548882ff980e90a71fb8ae00dee756

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