Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a7cf8386967f6d…

MALICIOUS

PDF

86.0 KB Created: 2020-12-08 05:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 26d2749283ed8c319408a00ed2aa82f8 SHA-1: b52176e26f6b9f93f842094fabd8b3aec42405b4 SHA-256: 68a7cf8386967f6d092b428cbcfc88a73a1617873bd30f036cf79c3fe60aaca9
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, traffset.ru, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=biology+genetics+worksheet PDF link annotation
    • https://dedaruxije.weebly.com/uploads/1/3/4/4/134455514/mogotut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_5f9aaa92ec39e.pdfIn PDF document text
    • https://gijepeparo.weebly.com/uploads/1/3/4/3/134318767/witix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5fc880da8921b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f8b1f9a9b0f9.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/bisute/96928820622.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/kisodosogil.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/ielts_answer_sheet_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/rinojemekewo.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/getefafatelo.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/are_you_there_in_french_informal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b2b17b-89b1-4c07-9695-36f54fe8e82b/71189449990.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/90377747282.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F9 6708 bytes
SHA-256: 1631d7f86c074d5a35ca8c3946b3dc7ba7a9c7ce0350a6184a92bf8937e64ce2
font_01_sfnt_off0000f8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B7 5156 bytes
SHA-256: 1815589b0dff40e738b275cf255dc275a58e47dd1ab5cdcbeefb68b73e0efb3e
font_02_sfnt_off00010a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5D 11960 bytes
SHA-256: a86a5cdd541551f878b90d70bf924946afe924c0a67b6c7c3879730bd0d6ee88
font_03_sfnt_off000132cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CB 16384 bytes
SHA-256: 5da0581923e8ace4484725d7a4378062a9ff0ac1ab1c8168416f74580731fde9

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