Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb2b0943545bd29…

MALICIOUS

PDF

73.8 KB Created: 2021-02-28 13:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 483d4e63834dbcd65f83c3a4def43e53 SHA-1: 405b5e477931b34658bc8dc7f43aae2a59120da0 SHA-256: 8fb2b0943545bd29dc12f83335e51743788e13e9743bcdf80c866a4020e0f610
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to 'https://nipisod.ru/strik?utm_term=jump+rope+cardio+calories', suggesting a phishing or social engineering lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate it's designed to redirect users to malicious content.

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://nipisod.ru/strik?utm_term=jump+rope+cardio+calories
    • http://prosale.company/cute_japanese_girl_dress_up_games7viuj.pdf
    • http://astropsychology.site/diziler_km_sorular_indiryhzq3.pdf
    • http://texewofe.22web.org/simple_employee_contract_template.pdf
    • http://atomyimperial.ru/vmware_player_freecklox.pdf
    • https://nunezujotegu.weebly.com/uploads/1/3/4/3/134312528/kevedusev-jotuwadux-tetezadexono-porixuke.pdf
    • http://luminar3-download.xyz/linden_mantel_clock_instructionsx2tex.pdf
    • http://x-bionic.shop/asccp_guidelines_for_pap_smearvmf25.pdf
    • http://mamontov-net.cc/potewajeliminiwuvev1fr4.pdf
    • http://difijeso.iblogger.org/el_alquimista_audiolibro_descargar_gratis.pdf
    • http://creamspait.xyz/when_dimple_met_rishi_netflix_cast7hr63.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/panokojol/2009_chrysler_300_touring_manual.pdf
    • https://s3.amazonaws.com/lawakux/24483697143.pdf
    • https://s3.amazonaws.com/tazibabebamep/bibliography_in_research.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_off0000e331.bin
1a123d201008bf0e1ad8ab4cf8a78d8944b85d27ef86a2a1e54cf749a9d93e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE331 5208 bytes
font_01_sfnt_off0000f4cb.bin
29ce9715d602dbfb17d4279053fb21322fc3a0f60009a6ea61265031fe10fc24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CB 11056 bytes

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