Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f964ea078e2013…

MALICIOUS

PDF

66.7 KB Created: 2020-12-06 10:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 021fbae54efb31d49e7c870e1d442a66 SHA-1: 1c2b70fd7fb570be4390de42360a801f40263a2f SHA-256: c4f964ea078e2013e68398429890311ff059425991387baa3742da59f81f8a0f
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, a technique often used to redirect users to malicious or phishing sites. One prominent link, disguised as a 'Deadpool mask sewing template', leads to known malicious redirector infrastructure. The presence of a large number of outbound links suggests a link farm or SEO manipulation tactic, aiming to drive traffic to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=deadpool+mask+sewing+template
    • https://cdn-cms.f-static.net/uploads/4425010/normal_5f9a01d3e18e5.pdf
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5f94973672e65.pdf
    • https://cdn-cms.f-static.net/uploads/4449793/normal_5fbc5c6d9eeb4.pdf
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f937e0e71cfd.pdf
    • https://cdn-cms.f-static.net/uploads/4495860/normal_5faef08424b62.pdf
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5f9c6265decd4.pdf
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/fodefifixobine.pdf
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5fc319e4eca48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6747eeb9-3d13-4b97-9d58-cb973cfcd734/services_marketing_zeithaml_6th_edition.pdf
    • https://s3.amazonaws.com/gixirojozogufux/1981802492.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/density_simulation_lab_answer_key.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/cdse_syllabus_2019.pdf
    • https://uploads.strikinglycdn.com/files/826cd918-6d6e-44e8-a1f6-253da4573374/3345864285.pdf
    • https://uploads.strikinglycdn.com/files/ca009178-d7ba-445f-96c6-4186fcfe4ce6/south_washington_county_schools_human_resources.pdf
    • https://s3.amazonaws.com/tizowodifi/kabatomujaxaxuxe.pdf
    • https://s3.amazonaws.com/fopalew/biology_form_2_revision_notes.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000babc.bin
18d1a5a48bb5a12d097b92519c949a7079420409096710c6b2fc6645f828618a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBABC 4552 bytes
font_01_sfnt_off0000ca9f.bin
9d08ead59592e3f844173c3b4073a276238b394b4ce98046f00dc211bb12f817		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9F 5336 bytes
font_02_sfnt_off0000dcd7.bin
c1e4ab7e770621e2f838ebec19385d9febd612d577d4f80abb1f5d0bd379f22e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 9044 bytes

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