Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81119a896d2a06e…

MALICIOUS

PDF

89.9 KB Created: 2021-02-27 11:32:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 958afa0811128f67185ef2b30de6a689 SHA-1: b7427cd0a9e71ed3316ba52d5d42a20e977334b2 SHA-256: c81119a896d2a06edb084e15a2b14317d5733d9ae0fe418344f75b9e6d6d1489
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a social engineering attack, likely a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=what+is+predictive+animal+models PDF link annotation
    • https://cdn.sqhk.co/vigefifobot/cbTjjsF/30562710260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5fc9cd97d98ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_6034cac86aac2.pdfIn PDF document text
    • https://cdn.sqhk.co/tuminageka/jfhe4ln/alone_season_7_episode_12_dailymotion.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413967/normal_5ff97a3245d70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453889/normal_5fc5b239628f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5fd2d0059ae98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/90732759982.pdfIn PDF document text
    • http://gadiwovujema.epizy.com/chaffle_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/77147819876.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/farozuruvogonur.pdfIn PDF document text
    • http://ladinuronabo.epizy.com/64891869165.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/organizational_communication_quizlet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/entergy_report_outage_new_orleans.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/62335752762.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_off00010fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDC 5176 bytes
SHA-256: 0fb172f59982b9e17b29cc038c742473d51643c01c23979612f287bd77186841
font_01_sfnt_off0001214f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214F 13548 bytes
SHA-256: 4f0737340a80d272a732c4f7a8aaf949c0ca6326dec9b180e1a19eaadf72d4bf
font_02_sfnt_off00014c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C71 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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