Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa4c3dbb4617cf4…

MALICIOUS

PDF

68.4 KB Created: 2020-11-25 23:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6657d1fe246f63f0ff191e6341b3d7b0 SHA-1: 2837b7c9cbee701c5a267419f58308dbfc1bcbec SHA-256: ffa4c3dbb4617cf45622742836bcd143ecff7c6646c2a6bfb4ee7d8a9ab53d6f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffmen.ru/strik?utm_term=komodo+dragons+eat+humans In PDF document text
    • https://vesemidibokopiz.weebly.com/uploads/1/3/4/8/134869856/kirujawowu.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/2224571.pdfIn PDF document text
    • https://fexejazawipezes.weebly.com/uploads/1/3/4/8/134869354/4eb76896259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_5fa0b71f1ebe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8a234c400c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5fbdc8c1a9fbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f99f61342b12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497078/normal_5fadaaf8b211a.pdfIn PDF document text
    • https://vabejodero.weebly.com/uploads/1/3/4/3/134378136/cb0565a4ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_5fabfd0f8e0f1.pdfIn PDF document text
    • https://lukimozogu.weebly.com/uploads/1/3/4/6/134638062/6e3709cf64764d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483624/normal_5fad14b36c630.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/fa10cae5-32dc-47f1-9574-e6e1a36a8286/92969143953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325ef730-75f5-4b01-946e-c8a8cd278bd6/dirt_devil_easy_steamer_deluxe_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0670d3-b714-4851-928e-c8605c8360cf/use_filter_in_protected_sheet_excel_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f59e8a2-0610-4ce3-8096-fef3b2d282d0/junction_city_fire_dept_oregon.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_off0000cd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6B 5176 bytes
SHA-256: 70a4103c334b6428ce2318256921c8c972e32165727a564c84aea2ea0bdd0b47
font_01_sfnt_off0000dedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDD 11228 bytes
SHA-256: 2c09b8f19e6ac008cd95e1b73428cf7b362f9c22aa1b39122a1bd4a1701b9472

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