Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83ff2a138b54337…

MALICIOUS

PDF

167.6 KB Created: 2020-11-10 16:37:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b52cc27414c17a46a0ed5dc31fc4f6d9 SHA-1: d17a0cee42ce6d0acc31e9a1ba9a66bda9b2d344 SHA-256: f83ff2a138b54337ff090a781dd9bcdaebd6f93c2917c60ccd75d188fcd38ffd
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?keyword=majoras+mask+for+gamecube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5fa5f04c1e9ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407081/normal_5f9b44e619414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_5f9760e0487f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388839/normal_5fa0e468995c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_5f945f66ebbe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f97c91346f91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f93ee1158544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f9991f2972f0.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/133165ae-0f0d-410f-90fe-ef086b943a04/kuwigaruratebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8e4217-16af-48be-93d5-50e13a84a175/77204680005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee66cba0-9733-4527-82ef-8d0ed2e06afd/71350202289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69164acd-92a2-46a1-baa6-5fc618c8b9af/tipulewazowaravavuzimona.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002481b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2481B 4020 bytes
SHA-256: 83df9ab05b5e9c84963030c76a16ee5d7c4d284a789fae1e2aff72ccd39174bc
font_01_sfnt_off00025643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25643 5456 bytes
SHA-256: 04ce07fa69b557afbbfc7882276f02c86ea95c8b87c50019678cc4f0dd9e71c8
font_02_sfnt_off000268da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x268DA 12092 bytes
SHA-256: 2730c20748fd1ff53c01c2eb0570fb75c8fee69f13565baca485b6822a13e550

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