Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a706fd071a2a316…

MALICIOUS

PDF

66.0 KB Created: 2020-12-15 02:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 573636e81388c4a3f2797fa47ac2c62a SHA-1: bb5d344b6defdddc1c53d7204c3e10f3565eeaa3 SHA-256: 8a706fd071a2a316fb6e6d538746a73226a7c37491d2c75e0c114faa92d20180
162 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=bmcc+academic+calendar+spring+2018'. The document also exhibits urgency lures, suggesting a phishing attempt. While no scripts were extracted, the presence of a malicious URL and the ML classifier's high confidence indicate a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=bmcc+academic+calendar+spring+2018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5f896bb091776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393647/normal_5fbb0af2cca55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_5fb2afe6bf1d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478393/normal_5fc86df1bf097.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/jvc_smart_tv_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/cognos_framework_manager_user_guide_11.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/formal_attire_template_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/naruto_arc_chikara.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/52554612263.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/aladin_2009_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/lemadedemizoruvubeku.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/ejercicios_causative_have.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/36400325514.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/camera_editor_apkpure.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_off0000c3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F3 5960 bytes
SHA-256: 1b813f038091dce29b91ca4270d94626d6e7a4790ee11da129dc0420629afe4c
font_01_sfnt_off0000d826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD826 10300 bytes
SHA-256: 367a89a66d022828538d864189c5f99296855e2d66c551e16746df28b5426939

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