Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0fe13f7d1339fc2…

MALICIOUS

PDF

58.2 KB Created: 2020-12-03 11:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e1897dd99857eab09bb9dabb213934e SHA-1: acfed70e69e407d6bfb8a545b3c9d436d19f9327 SHA-256: a0fe13f7d1339fc24c82953563cb24d401c2fa5db11cd284bfd3654daf6aa09a
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://cctraff.ru/strik?utm_term=mugen+stages+download'. The ML classifier also flagged the document with a high score. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to lure the user to a compromised site for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8918

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=mugen+stages+download
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/fefew.pdf
    • https://cdn-cms.f-static.net/uploads/4462736/normal_5fc3266b3f422.pdf
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fc1664f8a684.pdf
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5fbb83d653d8e.pdf
    • https://cdn-cms.f-static.net/uploads/4451220/normal_5fbe81b14286d.pdf
    • https://static.s123-cdn-static.com/uploads/4461763/normal_5fc3adb841b75.pdf
    • https://cdn-cms.f-static.net/uploads/4404975/normal_5fad23bd50617.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tiluwisulepam/business_feasibility_analysis_report.pdf
    • https://static1.squarespace.com/static/5fc4e10e2e34347c705dc52c/t/5fc57f927acac6192a7d49a7/1606778771023/senojedogibofu.pdf
    • https://s3.amazonaws.com/davolazupivowi/vampire_diaries_season_7_putlocker.pdf
    • https://s3.amazonaws.com/kudufigunabi/46501248260.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b14f.bin
3fafe99677dcba734b1fd80c19d500b0fa018117fd01fae9608a53b553dc8388		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB14F 3572 bytes
font_01_sfnt_off0000bde5.bin
8cae050e7e648108f895a221a6b7f44b56b909c4949c7167232f34efd65be92f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE5 4996 bytes

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