Malicious PDF — malware analysis report

Static analysis result for SHA-256 8430e7d1544dd307…

MALICIOUS

PDF

76.7 KB Created: 2021-04-06 17:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8babd3260007d357b5a81b316a6a2af8 SHA-1: 781260fdd1fa07e2a07bda62528d637f6d60a6b3 SHA-256: 8430e7d1544dd30721fbfbd7f4105412a8172daed8e0c5932b470f7d83861ace
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a malicious domain, likely intended to deliver a phishing lure or download a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/wix?keyword=in+defense+of+the+poor+image+summary
    • http://majugulowoju.22web.org/caballo_de_troya_4_descargar_gratis.pdf
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5fd6649a5b103.pdf
    • http://cosmeteca.com/nuzolodozitedewofivooj5k3.pdf
    • https://cdn.sqhk.co/someteku/8hhd0if/movafemejubakidezagimo.pdf
    • https://cdn-cms.f-static.net/uploads/4453532/normal_6060f646516ab.pdf
    • https://cdn.sqhk.co/turanexode/gcieiib/free_zombie_birthday_party_invitation_template.pdf
    • https://static.s123-cdn-static.com/uploads/4368982/normal_5feb6b125588f.pdf
    • https://cdn.sqhk.co/zegetaru/ih5mAhi/rulodisowogadexunube.pdf
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5fd2a52627afb.pdf
    • https://static.s123-cdn-static.com/uploads/4485448/normal_5ff2722ab169d.pdf
    • http://mysteps.online/293360332265qcxa.pdf
    • https://cdn.sqhk.co/kinanekoxo/VfiYDii/16738337065.pdf
    • http://jumuzonogajal.iblogger.org/sixesajaduwuzudivekif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://posopikepikan.rf.gd/ballpoint_pen_shading_techniques.pdf
    • http://xoxigibutu.epizy.com/firefox_for_mac_10._5._8.pdf
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_5e583ce848ec47e2b10f703c5a017e54.pdf?index=true
    • http://sanatosiw.epizy.com/2733497180.pdf
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_dc1531d71e494e3f89b52dba06364f41.pdf?index=true
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_feff3095a217468aa0bd4871a2715307.pdf?index=true
    • http://vudidesodus.epizy.com/problem_solving_method_of_teaching_mathematics.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_off0000ee62.bin
4fc569f325939efc1a0a1e93d727246a2ef1c2c685a0a9a34ca0f24736e41606
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE62 5464 bytes
font_01_sfnt_off000100db.bin
ee495567ad080921fe574599ad04409d1e8a122f64ca2762922f1ea34f13f95f
pdf-font-stream PDF embedded font (sfnt) at offset 0x100DB 10864 bytes