Malicious PDF — malware analysis report

Static analysis result for SHA-256 467916d4962726f8…

MALICIOUS

PDF

130.2 KB Created: 2021-02-14 17:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: f42760f7916d23840e4745a61d70dc60 SHA-1: 3bba70033d88b933b3035c70952c94aed4d90924 SHA-256: 467916d4962726f87ba21c07e74fd9f9d0941955981409941e8b16fd05236ff4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with the ClamAV detection name 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. It contains an embedded URI pointing to 'https://druttle.ru/123?utm_term=becker%2527s+world+of+the+cell+test+bank+pdf', which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to academic materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=becker%2527s+world+of+the+cell+test+bank+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450337/normal_60020096445a1.pdfIn PDF document text
    • https://cdn.sqhk.co/walekikem/dChcibs/14848946243.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375194/normal_5fcd74d5eb642.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443292/normal_5ffe7333a04b8.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/IhhgcZZ/the_adventure_girls.pdfIn PDF document text
    • https://cdn.sqhk.co/lagitesavap/Nf1ifjg/65093444232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416918/normal_601f310a22f52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481275/normal_5ff6cfdf2fa51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_5fd9bbc62ad6c.pdfIn PDF document text
    • https://cdn.sqhk.co/xazewizol/evjdhjO/kartrider_rush_wikipedia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422134/normal_600a4dc26aace.pdfIn PDF document text
    • https://cdn.sqhk.co/tumitibira/e7hemgc/duck_hunt_costume.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/nerugiraxura/11033739675.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/the_caliban_and_the_witch.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/samipidofume.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/total_war_warhammer_2_empire_campaign_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/macbeth_graphic_novel.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_off0001c025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C025 5620 bytes
SHA-256: 1e204284c3be4b485cdb391c5f365427655c9335816755b1742dda1ec964a96a
font_01_sfnt_off0001d35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D35C 11628 bytes
SHA-256: 3145d03f7a470b6fc645932b704e9b68401eba741e0aa659465f16dce6c8ab1a

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