Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5354371c952448…

MALICIOUS

PDF

92.4 KB Created: 2021-03-03 05:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ae3e2633488baef91b91f228cf2e83c5 SHA-1: c1f566d3d8a7fffb8a5735153f33669982489ed9 SHA-256: 8d5354371c9524484b377aa489e19ab29d3770a7f8dc9627b194aee93814ff9a
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, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to search queries.

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://kuzutuzo.ru/123?utm_term=write+condensed+electron+configuration+for+each+element+ge PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5fd7a5b7ec352.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/poe_the_raven_mascot.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/gadalotuvet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485446/normal_6034cf86344d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_601dd9e29d902.pdfIn PDF document text
    • http://jovepodixowofow.mygamesonline.org/71601909862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530323/normal_5fd86ddae7ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421199/normal_601efa3a08bb0.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/nefomojuwet/does_indiana_have_prevailing_wage.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/china_culture_information.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/android_barcode_scanner_source_code.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/66088523766.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/arduino_mega_r3_datasheet.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_off00012aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEF 5448 bytes
SHA-256: bd0e9b8fd6ffd2b7c2732f6ad2118590f589a413d5841f7a726a4943d85f18c2
font_01_sfnt_off00013d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D59 11492 bytes
SHA-256: 3804821fc11c6bfcea827d941d55d3010817365568bdfbd17e9edd7c0be63589

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