Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf26ff0eeebc310…

MALICIOUS

PDF

67.3 KB Created: 2021-02-15 06:30:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f95d71f6c6a8145d37f270267fceb272 SHA-1: 5c4936983dd87010a2d8f7a835b468fbb1d92976 SHA-256: daf26ff0eeebc310a92cbe85cbb2d23b4c7f6295294243309ed8ad99c4a463d1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high probability of malicious intent. It contains numerous embedded URLs, with several pointing to link farms hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/aws?utm_term=shyam+baba+new+whatsapp+status+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4527042/normal_601f295a9d4d1.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/bd9e5759009.pdfIn PDF document text
    • http://zafibekimov.22web.org/11757063864.pdfIn PDF document text
    • https://juxapokidopelif.weebly.com/uploads/1/3/1/6/131606881/rimigadaterikubom.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/jc84KsC/topesizoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/jinUhja/sufinonesonomilufex.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/dbfHdyz/36655720981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408188/normal_5fe568229f37c.pdfIn PDF document text
    • https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/fijanojuvotab.pdfIn PDF document text
    • http://padakogako.iblogger.org/20312945208.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jemibare.epizy.com/namo_android_application.pdfIn PDF document text
    • http://damokoz.epizy.com/19124766533.pdfIn PDF document text
    • http://xofaxisenulomav.epizy.com/basic_ielts_listening_li_ya_bin.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_off0000cc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC91 5568 bytes
SHA-256: 2ba2b18669f09fa1bf2384ef4eb7a68789262afce0fb37b114146e2459aff28b
font_01_sfnt_off0000df6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 9568 bytes
SHA-256: 17bcd2234cc3267281eb4a4618edfafe15e34d41bc82915f0bef38af09b98b08

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