Malicious PDF — malware analysis report

Static analysis result for SHA-256 472441f1c8040586…

MALICIOUS

PDF

59.3 KB Created: 2020-12-24 06:37:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edf38b18028df87acb7bdc94b890e77f SHA-1: d4e18432f2e657af6b54bf1234775244c38611da SHA-256: 472441f1c8040586234d18f2a823ea608112487aa3528b24e194ebee18dae253
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and appear to be part of a link farm. One of the embedded URLs, 'https://traffmen.ru/strik?utm_term=bounce+tales+game+cheat+code+nokia', is identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=bounce+tales+game+cheat+code+nokia
    • https://sumatolel.weebly.com/uploads/1/3/4/5/134527811/1375541.pdf
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/vepeg.pdf
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f98c0699db7e.pdf
    • https://gakifesobilale.weebly.com/uploads/1/3/4/5/134512030/lazipuwasije.pdf
    • https://pepagefowajuna.weebly.com/uploads/1/3/4/7/134738543/9852399.pdf
    • https://sezitekiporav.weebly.com/uploads/1/3/4/6/134627959/rifowedu-bibelixewifidaw-gasuf.pdf
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/916016.pdf
    • https://cdn.sqhk.co/jelivapizivo/ieuiip3/madujolipupipijavuziwug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/34653bc6-32df-4d66-bfee-f9607e9f2733/58680729275.pdf
    • https://uploads.strikinglycdn.com/files/042f495b-6876-4697-be5b-ba97e7ddefb6/benefits_of_extracurricular_activiti.pdf
    • https://uploads.strikinglycdn.com/files/7799792f-adcd-4002-85e3-35bfd671c5c2/gofakizudavevajiperevisi.pdf
    • https://s3.amazonaws.com/xesigeze/zogewivimelujomelelos.pdf
    • https://s3.amazonaws.com/mubemutolewe/89966821268.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad2e.bin
1f346c0603586366ffab1d6074045718c271f7e44828a9b71c89b02e127725b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2E 5368 bytes
font_01_sfnt_off0000bf4e.bin
95062d0476c18fb0828b13b53a80603da5979ba20ff8466844fabb93ef42c29b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4E 9732 bytes

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