Malicious PDF — malware analysis report

Static analysis result for SHA-256 578213b351c21041…

MALICIOUS

PDF

73.0 KB Created: 2020-11-25 01:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6a91aa04e11d65cdd1a5a02454ddfa9b SHA-1: 79cadd21e047614b03bf4dd2af02f8e6b26f3514 SHA-256: 578213b351c210415bfa182c7cd98ac3ca8744f9886caa458770828d6380b344
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to 'glasses with clip on sunglasses australia', suggesting a phishing or scam attempt. The presence of an external URI and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=glasses+with+clip+on+sunglasses+australia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426675/normal_5fbd9a6d75482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5fb71880a29eb.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/6842c153-ee04-4076-91de-d963722a211b/94400565821.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/74291482223.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/illinois_foia_law_enforcement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/wekaxigim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b60beee-54e4-45fd-b4e2-821044b6ff97/kebasakafotizarip.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/16557530182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04623c7f-03ca-4087-b8d2-50529022f217/68272405927.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/messenger_dark_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74a6bd7-050d-4128-8b37-b0a925f0e9be/36044042010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4884efd-def4-4701-9f20-50ee40f20d92/the_intelligent_investor_first_editi.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/army_drill_and_ceremony_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/44008701810.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_off0000df7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7A 5316 bytes
SHA-256: 6cdab24731ffbcc2dd0cd3cd0e97eab286cc9bea9930c059a910eefdfde40671
font_01_sfnt_off0000f19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19D 10816 bytes
SHA-256: 595a6a4e3a6c69a4565378622c8b4347982d6b19c3f84ed8612b801f84360b25

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