Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ceae5ac79225f9…

MALICIOUS

PDF

83.9 KB Created: 2020-11-14 22:28:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5b7b35fa0a6662f7a4392fbdeac0872f SHA-1: 294bd3b6114901643167bba63269064599fea2f7 SHA-256: 22ceae5ac79225f9a5c54c6f739dcca910d67b38885b69a0aad03370df63d3ca
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL pointing to 'traffine.ru', which is likely part of a phishing or social engineering attempt to trick users into visiting a malicious site. No scripts were extracted, but the presence of an external URI and the overall detection suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=linksys+wrt310n+802.11n2x2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f8753da0e986.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/donake/typographic_design_form_and_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d29e711-87b4-4c99-a01c-e482baf4c223/gugekipolinovanokumuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e21264-5643-4e56-8b6b-d0565626356a/20519336700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d010c58e-89e6-4f86-9b0c-7cae13828f31/puduwijibevasapetanolafef.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/97692245582.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/romantismo_no_brasil_resumo.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/74346675515.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/dawokadubonijuromo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10a0d34-50eb-4474-918b-e71579acfda4/93705422345.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_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 7132 bytes
SHA-256: 85be5b052dd129ad0a06287387278e683b10ebb18e41d20de550a59e523b9285
font_01_sfnt_off00010673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10673 5420 bytes
SHA-256: 08e00974988b5de8995675edb2e7a41d0d8d57a0c9d472f7705e30511f14025e
font_02_sfnt_off00011924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11924 11764 bytes
SHA-256: 55bc8d7c0e352a0a74d9a26436db6383c46797aa9694c30099aaf149bc397c22