Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b18693505c1fdd2…

MALICIOUS

PDF

68.1 KB Created: 2020-11-16 16:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2d609c4b45b5c3dbce706cae0acd1861 SHA-1: 75b3db691ff9f010feb5017126e4f482f0418805 SHA-256: 2b18693505c1fdd2f4b3729538d18f7255fb611ab122c486549d4f05f6431d71
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 'cctraff.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL suggests an attempt to lure the user to a phishing or malware distribution site, likely delivered as a spearphishing attachment.

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://cctraff.ru/123?utm_term=asa+official+rules+of+softball In PDF document text
    • https://lalusaguru.weebly.com/uploads/1/3/4/6/134611329/3772f371d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f874b648ab65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467019/normal_5fa67e07d2b5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f86f5058a00f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_5faa672b81c8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5f90787738264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_5f92c84a10864.pdfIn PDF document text
    • https://paxavolufogese.weebly.com/uploads/1/3/4/6/134600391/delogalipoz-redadujexobux.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/6b5da981-047d-4bb9-a9f5-a469bf818f80/ridalivuzilanesipitazupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/802a3f44-02c6-4d89-af15-2e8ffc939e75/mo_creatures_mod_fox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c9d27c-0ef3-4ee0-9d7f-42094a31f127/98778822669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a835ba02-4e83-49f8-8179-df91e2bdc14c/jowarorilaperimosino.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_off0000ce8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8F 5004 bytes
SHA-256: 554ff832f2f0169919f0a057cb4ad7de48af0fd4b58baed592492202b34b2eda
font_01_sfnt_off0000dfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA6 10656 bytes
SHA-256: fa567a98127e62da8b48c12c52e18a0cb7050ac7bc352f8dfe31392abedbddda

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