Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fb01c18436fcc3…

MALICIOUS

PDF

73.2 KB Created: 2021-02-24 22:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ac66f65c8c3fe05661f521c11005e9ca SHA-1: bcb82de27af293f66a21cb19e7fa154a297576db SHA-256: e1fb01c18436fcc3f7a499da7e15278320a9f2582106357f239e28fc79d09b18
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wix?keyword=burlington+township+schools+employment PDF link annotation
    • https://cdn.sqhk.co/xeduwukaxusa/2Kjdw82/31729895426.pdfIn PDF document text
    • https://tewawizibix.weebly.com/uploads/1/3/5/3/135347661/dejetotupivewaw.pdfIn PDF document text
    • https://gasinokumujum.weebly.com/uploads/1/3/1/4/131437883/fominizidirelog.pdfIn PDF document text
    • http://znatural.space/zafalamumawijifa0rea9.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/giwokuvuka.pdfIn PDF document text
    • https://sererewaxux.weebly.com/uploads/1/3/4/9/134903335/pabelugepazus.pdfIn PDF document text
    • https://cdn.sqhk.co/xiponamoribo/ifkBggN/turbo_racing_3d_car_game_download.pdfIn PDF document text
    • http://mon-cmso.best/19105850834f8jiy.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/dhjQSH5/44761729206.pdfIn PDF document text
    • http://beautysss.site/braun_differential_equations_and_their_applicationspj4d4.pdfIn PDF document text
    • https://cdn.sqhk.co/naxisedomak/SbZJMgh/rush_limbaugh_live_stream_app.pdfIn PDF document text
    • http://detonic-deutschland.website/filofatusufitn91nu.pdfIn PDF document text
    • http://nyvelsets.online/96003366866oe5t4.pdfIn PDF document text
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/9891bd1c06c3cf5.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/fusidejebi/carry_on_jatta_film_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/weather_report_bihar.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/zisomilaligitusa.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/interjection_worksheets_for_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/character_development_books.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/visetazadamos.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/645155920.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_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 5380 bytes
SHA-256: 21cb27f13255e620cc6438a329f501c48160bc815721b76d597434b482a0847c
font_01_sfnt_off0000f32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32B 10480 bytes
SHA-256: 18a88aaa08034f6a646af6f88421379e7a713f1fa210ba1fef2ea80191745191

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