Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61c8d5bcd600492…

MALICIOUS

PDF

64.6 KB Created: 2021-02-26 18:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47d3d8d0bf7cb9e8899f118d53fdf4e1 SHA-1: e4ed2c76b6c50d2e8d7256e5c9f5d532b43e90d6 SHA-256: b61c8d5bcd6004926745af749dc22e42d95a0da48b4cb66329a842a7f5097850
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The PDF structure and embedded content suggest an attempt to disguise malicious activity, possibly through obfuscated JavaScript, though no specific script actions could be confidently determined.

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://jumiwimov.ru/123?utm_term=what+is+the+climax+of+the+story+federigo%2527s+falcon
    • https://static.s123-cdn-static.com/uploads/4409420/normal_5fe07c7de557b.pdf
    • http://nizavevorupuj.mywebcommunity.org/what_is_gothic_art_characteristics.pdf
    • http://copyright-help-center.com/how_to_calibrate_samsung_front_load_washerqgk80.pdf
    • http://kostlike.site/pomemugibajuzuralodotoro4p9ee.pdf
    • http://bovewitavivebu.getenjoyment.net/emerson_lc320em2_remote_code.pdf
    • http://jedusajinud.mygamesonline.org/2004_chevy_malibu_lt_v6_for_sale.pdf
    • https://cdn-cms.f-static.net/uploads/4479923/normal_60272e1e13d7f.pdf
    • https://cdn-cms.f-static.net/uploads/4479212/normal_602c4c0c29352.pdf
    • http://dogalijun.scienceontheweb.net/como_preparar_un_bosquejo_biblico.pdf
    • http://xubanapirobula.mypressonline.com/mr_coffee_4_cup_coffee_maker_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4426556/normal_60125fcb67120.pdf
    • http://ing-jobs-opportunities.com/yugioh_forbidden_memories_drop_listri9ld.pdf
    • http://madoxorijegobe.sportsontheweb.net/panurolin.pdf
    • http://tiktokhd.design/63454488939nk8oy.pdf
    • http://wei-nmvc.com/40024026882tcr7q.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zijiwaras.onlinewebshop.net/94656675663.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_off0000c0d7.bin
5014030c9401e8ec9a6245eaf8ae03f90b91fda8fea535e3e2a9b01c8b266644		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D7 5652 bytes
font_01_sfnt_off0000d404.bin
c43f843f72b5a2bdf437a3b117e4c1976fe5b3aefe7cfcedfde7fc190ec2525a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD404 9692 bytes

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