Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee48fb972412be7…

MALICIOUS

PDF

68.7 KB Created: 2020-11-30 23:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dec260582c6a2f787635530307cd2ef0 SHA-1: 1631003736fb58e6450aff31a483494cc0b0d7dc SHA-256: 8ee48fb972412be72c25c224d0fcdb8e96cdda8b28b11d2ad45ffacefec3c226
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'traffset.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, further supporting this. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan.

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://traffset.ru/strik?utm_term=sony+cyber+shot+hx400v+instruction+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5f91579e57c85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_5f969f1680439.pdfIn PDF document text
    • https://pudarafuweza.weebly.com/uploads/1/3/4/4/134479559/xumaxerode_jonafevibivaniw_mikaxen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_5f9a1788ebd80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383915/normal_5fb2edd5c1583.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/177f2712-c493-4124-9101-336e5c6e0878/pazolamazor.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/free_augmented_reality_apps_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/laluwiletakovevupimivifa.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/ardiente_paciencia_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a44f99e6-7cea-4e90-ad30-ea6e570b58d2/75_nova_pics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898af222-8f68-4ecb-9416-dc34405aff2b/gosez.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/bijabirogawedajofagede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da0e89c-3091-418a-b545-a2c5a9c99fa8/madivikodaba.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/pepupowelirodo.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_off0000ced8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED8 5740 bytes
SHA-256: 683f118d122330853d993124b0a49ff6cb4060c6ea9e69fbc30adff98375d696
font_01_sfnt_off0000e252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE252 10448 bytes
SHA-256: 4c673d42052220b64dee5360dfb108c3dd6b24e731070b839e0ed4b65102e723

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