Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ce343de3f795b2…

MALICIOUS

PDF

75.9 KB Created: 2021-03-22 16:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b835225515fa9544add22c29ffc5e9a9 SHA-1: 7ec4bb04ad641c52bb80f2075052c07f3937c187 SHA-256: f3ce343de3f795b263d4e91d4487dd28061d3580d7a19a53e6f007127d2078fb
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing lure. ClamAV detection and ML classification further confirm its malicious nature. The document body, though heavily obfuscated, suggests a context of an 'authority matrix' or award, likely a pretext to direct the user to the malicious URL for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=authority+matrix+pdf
    • http://idealica-columbia.site/61266548631p974o.pdf
    • http://uscreditinquiry.info/when_can_i_book_disneyland_paris_2021w0k36.pdf
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/nibonusa.pdf
    • http://alternativeinfluencenetwork.net/plantuml_activity_diagram_example5c06t.pdf
    • https://cdn.sqhk.co/roretuduva/ddnQlAo/mepefumadubulop.pdf
    • https://cdn.sqhk.co/mupijuwo/1ijfNhc/samunufox.pdf
    • https://wajotirege.weebly.com/uploads/1/3/5/3/135306859/5bfa365b9b07.pdf
    • https://cdn.sqhk.co/zozijawutuxu/vLgd7hc/best_anti_hero_movies.pdf
    • http://khareedforosh.com/86029639422wbetv.pdf
    • https://lulegosepo.weebly.com/uploads/1/3/0/9/130969478/zurobafoguki.pdf
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/a348a8caf502.pdf
    • http://biolinkus.me/cold_cases_investigation_mod_apk5bkv5.pdf
    • https://cdn.sqhk.co/lesasafo/gjnijaA/mokil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vatasinunevuto.epizy.com/29871204344.pdf
    • https://s3.amazonaws.com/tiduro/24707298531.pdf
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_d4eae0f205ad4e8084f7b099225450ab.pdf?index=true
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_5b9e4d63976a420ab509bc3fbb3dfe63.pdf?index=true
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_114edfc7dfd14d5a9dd0a067c106b33b.pdf?index=true
    • https://s3.amazonaws.com/wifiduxezo/what_is_renaissance_in_italy.pdf
    • https://30d6ba4c-d201-4e26-8f31-a0e059b28788.filesusr.com/ugd/f9b8bb_6ec30d264c7f41199b6ced620539f9c1.pdf?index=true
    • http://jalameki.epizy.com/characteristics_of_living_things_worksheet_answers.pdf
    • http://ratosore.epizy.com/rizekofuwevesevisozuza.pdf
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_bfdecdf015974f46885849289c5bddce.pdf?index=true
    • https://s3.amazonaws.com/resixexi/formative_and_summative_assessment.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_off0000ec77.bin
bb63ef5eb70087109752d808a538ea8ee97f80df404034a1cddced9cf61ad136		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC77 5228 bytes
font_01_sfnt_off0000fe25.bin
e6d9a6f0daf25bc9b11d9c70b30b8983da0d84999bec5328f35f736d351e7433		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE25 10668 bytes

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