Malicious PDF — malware analysis report

Static analysis result for SHA-256 494831d0362e010c…

MALICIOUS

PDF

78.3 KB Created: 2021-03-13 20:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50555d24e5197dadaec4fd64302e8cd6 SHA-1: dcc6b454d3b75618c47dfb12261eb2602f55c7f6 SHA-256: 494831d0362e010c22588645e2fe607b9d43bf0d6a61cd75b0bd22417b7fdbc1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a malicious payload or redirect the user to a phishing site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests an attempt to trick the user into visiting a compromised site.

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://mezovuduw.ru/award?keyword=extrusion+blow+moulding+process+pdf
    • https://cdn-cms.f-static.net/uploads/4472204/normal_6027fec5f267d.pdf
    • http://siondez.ru/factoring_trinomials_guided_notes2dvv3.pdf
    • https://static.s123-cdn-static.com/uploads/4460233/normal_5fcf471138c02.pdf
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/wowokupafis-fufodor-dipiwewis.pdf
    • http://floradoma.net/800099894002ix6r.pdf
    • http://aycotoro7.xyz/sogafemozul5ag5.pdf
    • https://cdn-cms.f-static.net/uploads/4490125/normal_6040e426c4e8c.pdf
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/fojebexuvuvapigene.pdf
    • https://cdn-cms.f-static.net/uploads/4369911/normal_601e6ed944793.pdf
    • https://radumudoxelis.weebly.com/uploads/1/3/4/2/134235428/fekozor.pdf
    • http://pirugaf.iblogger.org/71614499133.pdf
    • https://static.s123-cdn-static.com/uploads/4484609/normal_6009912a387fa.pdf
    • https://static.s123-cdn-static.com/uploads/4468274/normal_5fdf4883c52df.pdf
    • https://cdn-cms.f-static.net/uploads/4500893/normal_5fd310a13936a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lotibabakuj/47304127736.pdf
    • https://s3.amazonaws.com/satuja/acceptable_forms_of_id_colorado_dmv.pdf
    • http://ditiruvovuluka.epizy.com/what_does_biblical_intercession_mean.pdf
    • http://tupomomi.rf.gd/nizatuzakiwerope.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c0.bin
503eb1d0ad0bfd15d20bc5f655a070bcca46db629f18493d926e6d390475b979
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 5524 bytes
font_01_sfnt_off0001068d.bin
95df6700d85e290e022406b99543bcc579573d44ef69a71913d8ae5c0a0abf46
pdf-font-stream PDF embedded font (sfnt) at offset 0x1068D 11032 bytes