Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c67cd395dc03636…

MALICIOUS

PDF

75.7 KB Created: 2021-02-05 17:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2f79f9f923b3c575bc92737315a68337 SHA-1: dcedf5ed463a94579b5f21e2de5efb3ea9c7b3e3 SHA-256: 2c67cd395dc03636edf592feca8a6a3c94e507c0ea26e9c24574c872f27cb537
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wb?keyword=bcg%20full%20form%20in%20medical PDF link annotation
    • http://ch-data-2a8fv9s.pw/determine_the_machines_second-year_depreciation_using_the_double-declining-balance_methodl4wuz.pdfIn PDF document text
    • http://fullhp.info/advanced_hook_gta_5grob6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_5fd98609248db.pdfIn PDF document text
    • http://badge-verification-center.com/92486632347l8uct.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499023/normal_6008f7ff6a915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475852/normal_601694db22365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_5fd5f7b36062d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368225/normal_60089dec3b076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486987/normal_5fd94a4882c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5fe9c934cccd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413566/normal_5fc8fba9e5cee.pdfIn PDF document text
    • http://hydrofthol.space/jixitavurajobuzuripijedxve95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisiku/backup_whatsapp_messages_android_to_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/30194663826.pdfIn PDF document text
    • http://kanomovezizof.epizy.com/a_modest_proposal_literary_analysis_satire_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/judemisirafizijelekep.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/valentine_s_day_worksheets_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/android_10_xiaomi_mi_a3.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/12034870942.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/livro_administrao_de_pequenas_empresas.pdfIn PDF document text
    • http://mijekobafenado.rf.gd/sateduzujivedakegajevoku.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 5212 bytes
SHA-256: b23831c8d5643c7dad458e789c741d90046d826c8e1f9b15f59a203f28a1aa28
font_01_sfnt_off0000f57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57D 13960 bytes
SHA-256: e54f730cb934266984d7a4f1c2002b46d6a293bab190200197d5823dd2c51f38

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