Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7413e624417f0a…

MALICIOUS

PDF

75.4 KB Created: 2021-06-03 23:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbfad14d0ba90dedd352d3d034cc1fdc SHA-1: d5b33101c8f5a6c87b7cca9aa7d4e1a94c7fe34d SHA-256: 1e7413e624417f0a28d34662cb8296739fbc5816d9e39f69f0002a43c8628199
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, flagged by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. While the document body is heavily obfuscated, the presence of an external URI suggests an attempt to redirect the user to a malicious site.

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://cructi.ru/pbw?utm_term=nuremberg+laws+worksheet+free
    • https://cdn-cms.f-static.net/uploads/4490516/normal_606274a714300.pdf
    • https://tusunupo.weebly.com/uploads/1/3/4/5/134507020/wugomube-gedivewitov-buzigetowoso-sevoxo.pdf
    • https://cdn-cms.f-static.net/uploads/4408864/normal_603d7b1edc985.pdf
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/8144514.pdf
    • https://cdn-cms.f-static.net/uploads/4478932/normal_602cd9af4d9e9.pdf
    • https://static.s123-cdn-static.com/uploads/4460465/normal_5ffdd16bf187e.pdf
    • https://tofeligekejogen.weebly.com/uploads/1/3/4/8/134873344/tekudimi_fofiko.pdf
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5fdde2010dfc1.pdf
    • https://cdn-cms.f-static.net/uploads/4369922/normal_600eb3898c76f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tazijebep.pbworks.com/f/izgi_film_indirme_program.pdf
    • http://xalomuzavege.pbworks.com/f/70676723102.pdf
    • http://pagorevet.pbworks.com/w/file/fetch/144448401/bagakufovadoxepa.pdf
    • http://nunaruribeg.pbworks.com/f/critical_ops_mega_mod_menu_apk_2019.pdf
    • http://lulimogosan.pbworks.com/f/siberian_husky_cross_white_german_shepherd.pdf
    • http://funesut.pbworks.com/w/file/fetch/144549051/qu_sntomas_tiene_el_cncer_de_vejiga.pdf
    • http://xugilip.pbworks.com/w/file/fetch/144507744/all_types_of_transistor.pdf
    • http://jitilabajeko.pbworks.com/w/file/fetch/144504576/garulabivapapozavadaliw.pdf
    • http://vedufid.pbworks.com/w/file/fetch/144510672/a_practical_english_grammar_exercises_1_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc2d.bin
08fe5435cf0267e26c73b2b85ec493076ddfa67ab240dca8560d6b9a46cd5e42
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 5176 bytes
font_01_sfnt_off0000ede8.bin
384a83f0c1134395929bcef4e217ac615e0e40dbd491bea6fe55db5d5dbcc4af
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 10688 bytes
font_02_sfnt_off00011288.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x11288 4324 bytes