Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c65142d347a10e…

MALICIOUS

PDF

72.2 KB Created: 2020-12-15 20:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f0b9a3396c14f342a7c5b5a38558aaff SHA-1: 6f96e6d320852e0e28051af5c32fb0a693b7e57b SHA-256: 68c65142d347a10eb14cae6a4f5f21433e9ee53b38cb00e92d28445b0ceb6b75
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, https://traffine.ru/strik?utm_term=eureka+math+lesson+14+answers, is likely used to deliver a secondary payload or redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit vulnerabilities or trick users into visiting malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=eureka+math+lesson+14+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5f8a976958e0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478928/normal_5fc2b8e2d79c7.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/ab9d40e1-4e4d-4dc5-b648-dad30235ca71/android_modded_games_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082d6fb1-8846-4f08-a2a5-e7b96b20e7d1/97160111576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b9eb28-dfec-476b-a173-0f86b573f275/apariencia_fisica_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/5_minute_guided_gratitude_meditation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7af6f9a-fc0c-4d7c-b923-1b88d28fe98e/golevizi.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/14341086840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ebcf77-eaa2-4561-8663-912e64363bd8/paxaxav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf69ef81c9a2a0c67bdfc/1606284958886/how_to_make_enhanced_gruel_conan_exiles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2d90fe-c7cc-40e7-ade1-d9b385bd545c/20384623863.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c023570fb44d1f90087/1606372355631/jewodetefuto.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_off0000d8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CD 5180 bytes
SHA-256: d83b6287f67b5caf8198c086a83ec9263c99df4f68873279cd765d417b448933
font_01_sfnt_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 12452 bytes
SHA-256: 004f943bb8d4a851e9da59b970512ba819c3e07ea0935982a0bdbbd20bb5bf27

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