Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cff75756a4012bc…

MALICIOUS

PDF

64.9 KB Created: 2020-12-22 20:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f89439e0f8943fcadb941b8065c525b0 SHA-1: 1395a03497a9c1b004639c09ca4f0ec15f082b32 SHA-256: 7cff75756a4012bc5201b3a452893872da3789ae0b4b5d1ec4521ad234c4de64
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URIs points to 'traffnew.ru', which is associated with malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/strik?utm_term=casino+games+slots+machines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f962f799dc2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5f9279166c619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449392/normal_5fb293523f359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418791/normal_5f9b48f977bb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449170/normal_5f9efd72ca4c9.pdfIn PDF document text
    • https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/2739c1f857a18.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/liluvad/91533385487.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/87178738755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a67da276-852b-4b7d-91e9-131453f7bb34/desafios_para_el_desarrollo_y_bienestar_colectivo.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/86188611593.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/lord_s_labyrinth_poe_guide.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_off0000c308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC308 5024 bytes
SHA-256: 4e0917b4c8ff29b8a1f06c9cf86945740439c61bed34d3277300562d3d97dc2e
font_01_sfnt_off0000d3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F5 10304 bytes
SHA-256: 9b49213adcf1f1aeb94685360720f31d9020b116e07e8625b1c137549a4549de

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