Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b74aab66f23a5f…

MALICIOUS

PDF

70.2 KB Created: 2021-02-11 19:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8553abcd6ace6f5937c0cb17fdeb21af SHA-1: ace63f4d796a165b137d751f641ff3dde7cf7e07 SHA-256: 84b74aab66f23a5f1ebce9318260f0c83cacdba4d4c3e63303020f658fbb6282
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a suspicious domain, disguised as a search result for an audiobook. This indicates a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file. No scripts were extracted, but the embedded URI is the primary indicator of malicious intent.

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://druttle.ru/wix?keyword=a+raisin+in+the+sun+audiobook+act+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411511/normal_602199d48bca3.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/gjzhdU3/76700229670.pdfIn PDF document text
    • https://cdn.sqhk.co/mowefakura/UgNic08/nojazoweziboduvemepiman.pdfIn PDF document text
    • https://kokesekodabese.weebly.com/uploads/1/3/4/0/134012443/dd56e886b57c.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/zowejunef/tamilrockers_1080p_movies_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/clash_royale_chest_opener_simulator.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/dremel_4000_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/73519167852.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/10858472587.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/fraser_river_salmon_fishing_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/rizomuwediwe.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_off0000d66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66C 5352 bytes
SHA-256: f898e9bcad91fc29ea2edfc9773e0d3937196b3b8a0f0e125fed27509d9266e3
font_01_sfnt_off0000e896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE896 10264 bytes
SHA-256: 2f00f4fc84140475bb772d3257234fd430fd6d0ce234b223a0033ea7b553847f

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