Malicious PDF — malware analysis report

Static analysis result for SHA-256 428de31f1f3594dc…

MALICIOUS

PDF

76.5 KB Created: 2021-05-15 23:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d24a92b69a4083a30a975cad35b4a27 SHA-1: 66ff864823185c7ebce946efa15460808b93473f SHA-256: 428de31f1f3594dc20c3e1852d7e38f0d86be4cc15b40217d1a526a07ed52dd7
96 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. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to deliver a malicious payload or conduct phishing. The presence of multiple unknown reputation URLs further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/wb?keyword=mazda%20cx%205%20remote%20starter%20battery%20replacement
    • http://6gusevshop.website/european_union_brand_guidelinesa8whg.pdf
    • https://cdn-cms.f-static.net/uploads/4451556/normal_6057b3fd99812.pdf
    • https://static.s123-cdn-static.com/uploads/4387224/normal_600701725392e.pdf
    • http://lidudopunabiril.22web.org/tolitewuxomaxolofog.pdf
    • http://civiliscmq.online/how_to_check_if_my_ecm_is_badxktty.pdf
    • http://smartcreditscore.info/giwogesepalupebunip6b7l.pdf
    • https://static.s123-cdn-static.com/uploads/4406166/normal_5fc92ea1814e3.pdf
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5fd7e9b138bb7.pdf
    • http://losasawavezu.iblogger.org/73589165299.pdf
    • http://xefenudopete.22web.org/xuwitogagapolikozojolub.pdf
    • http://bubble1.space/97149022460vl0da.pdf
    • http://gabameled.22web.org/twilight_saga_hindi_movie_download_hd.pdf
    • https://cdn-cms.f-static.net/uploads/4369183/normal_604cd7fc29400.pdf
    • http://intereriia.com/solid_liquid_and_gas_worksheet_grade_2qpt61.pdf
    • http://natur-green.fun/sodevijizazidwjcgb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4d583e34-7206-41a4-aeed-052dfa74bf9a/what_was_congresss_plan_for_reconstruction_quizlet.pdf
    • https://uploads.strikinglycdn.com/files/2a828e64-d418-4232-b7b2-66ee0ab62ce7/58965390475.pdf
    • http://ziwibavufu.rf.gd/47020598946.pdf
    • http://nurelit.epizy.com/duxufefikixugu.pdf
    • http://kewumexor.epizy.com/63937684067.pdf
    • http://gonuwufif.epizy.com/sawebupifati.pdf
    • https://uploads.strikinglycdn.com/files/692b6f79-e34e-44f1-9584-8b135106516f/vicks_warm_steam_inhaler_reviews.pdf
    • http://nenezonel.rf.gd/20231449487.pdf
    • https://uploads.strikinglycdn.com/files/a00239dd-bf79-43de-af0a-8baad85fce8f/what_is_google_cardboard_vr.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_off0000ea21.bin
ece8d4c39c3b10ca9366157f8e365ae0f963d2412c36fd0d2e7916bef26edee3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA21 5708 bytes
font_01_sfnt_off0000fd97.bin
979822a5a558fb160acfb20129c5d2aa964d2b84883d6ed6f127d43c309a72bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD97 10700 bytes