Malicious PDF — malware analysis report

Static analysis result for SHA-256 669b7aec3570bc0e…

MALICIOUS

PDF

85.0 KB Created: 2021-03-20 19:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1640d3a3f7f7c0320d51fb0573268541 SHA-1: 1df76ecfae4947f065dc5745c638391dcc294008 SHA-256: 669b7aec3570bc0e4459ae6a3467c8ad8991d6a3b96caec199ee02f6c08e582e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. Heuristics indicate the presence of external URIs and a machine learning classifier flagged the PDF as malicious. ClamAV also detected it as a phishing trojan. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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://zajinet.ru/wix?keyword=bruce+r+mcconkie+final+testimony+download
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5fdb13b41e1f6.pdf
    • http://capridigi.com/fender_mustang_200_watt_amp0pz1l.pdf
    • https://static.s123-cdn-static.com/uploads/4448328/normal_6004fcdee82c2.pdf
    • https://cdn.sqhk.co/gikokimofegi/Rjdjghe/bubble_shooter_rescue_2.pdf
    • http://mybiol.site/jevozelivizurobii4tp4.pdf
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5fda050b24c44.pdf
    • https://cdn-cms.f-static.net/uploads/4367952/normal_601127a4c4f35.pdf
    • https://cdn.sqhk.co/tugirujozi/mqj77gd/adidas_clearance_outlet_near_me.pdf
    • http://brandframeb.com/triade_de_cushing06068.pdf
    • https://static.s123-cdn-static.com/uploads/4492875/normal_5ff1c58293946.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vapelurowar/79283545866.pdf
    • http://visowad.epizy.com/lotusebimejeluna.pdf
    • https://s3.amazonaws.com/zubuwujoxom/sisomilov.pdf
    • http://gevewodex.epizy.com/24351634682.pdf
    • http://timonuxe.rf.gd/nonose.pdf
    • https://s3.amazonaws.com/wexukufedepim/zikevegok.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/local_anesthetic_systemic_toxicity.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_off00010dba.bin
48a2a318c7898cdbf32525b8401a80d90bfe757831b723f8f8326ca46676fda0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBA 5472 bytes
font_01_sfnt_off0001205d.bin
4fca6d7b8ae35b88eb180ef8b1e56d20acd771d73e3aa7b18f3b0b44f0f37efd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1205D 11220 bytes

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