Malicious PDF — malware analysis report

Static analysis result for SHA-256 478c64d287814539…

MALICIOUS

PDF

86.8 KB Created: 2021-04-11 00:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42174fa139b6e769260c3b9390cf8ab2 SHA-1: 2c23fc23475448a5950e82cf1f2434b2bb034e80 SHA-256: 478c64d287814539bd6b9b64ac770f3c81d5aebb37c84a730304de82743bd13a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit vulnerabilities or trick users into visiting a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=short+stories+pdf+middle+school
    • https://cdn.sqhk.co/xajevedu/hid4Ihb/43386743650.pdf
    • https://cdn.sqhk.co/fujotojaxob/fkgibhd/lemafirowibavuwoleg.pdf
    • https://static.s123-cdn-static.com/uploads/4381101/normal_6007c26270eaa.pdf
    • https://cdn.sqhk.co/kawonidoza/jgi8imM/europe_empire_2027_money_hack.pdf
    • https://cdn-cms.f-static.net/uploads/4371807/normal_605d87225f3dc.pdf
    • https://cdn-cms.f-static.net/uploads/4420031/normal_6040595686232.pdf
    • https://cdn.sqhk.co/bilexodofose/GidifYT/koxudevafavijivisadexurin.pdf
    • https://cdn.sqhk.co/vigesiji/rhjboBL/raj_bstc_answer_key_2019.pdf
    • http://wunegufope.iblogger.org/zudoxu.pdf
    • http://rubarenuruvofi.iblogger.org/dometic_9100_power_awning_installation_instructions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://manisamat.epizy.com/37170916615.pdf
    • https://uploads.strikinglycdn.com/files/7039cc88-a899-49f8-8ea9-93e612f263c0/39587728484.pdf
    • http://dovijurosovixen.rf.gd/sketchup_free_vs_pro_reddit.pdf
    • https://uploads.strikinglycdn.com/files/b9c08bb2-4357-4a30-8759-36258c9a5368/how_much_weight_can_a_2020_subaru_forester_tow.pdf
    • https://uploads.strikinglycdn.com/files/d4468cf9-c813-4ea9-958f-f55b260a7be1/93474757866.pdf
    • https://s3.amazonaws.com/mufukep/combine_excel_tabs_into_one_sheet.pdf
    • https://s3.amazonaws.com/fosagoba/lemekuxibefejoloza.pdf
    • https://s3.amazonaws.com/pogolo/chloroform_methanol_extraction.pdf
    • http://zinikifog.rf.gd/nexijujoxo.pdf
    • https://s3.amazonaws.com/kiwopusafize/37030326857.pdf
    • https://uploads.strikinglycdn.com/files/40984339-28e2-4699-86e9-c49aa9941d81/33769201516.pdf
    • https://s3.amazonaws.com/potamotaz/100_aos_de_soledad_summary.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_off0001173c.bin
bb9374ee7855ba74afb7e045cca93f8dafcc92ca27404a354c1c5f9b8f7510d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1173C 5288 bytes
font_01_sfnt_off00012912.bin
25b93f59977a8cd2db21237e9c5f6d39ff64ca5818cd234e1cad3d135dcb7dae
pdf-font-stream PDF embedded font (sfnt) at offset 0x12912 10864 bytes