Malicious PDF — malware analysis report

Static analysis result for SHA-256 2520bee9931bf4b6…

MALICIOUS

PDF

75.4 KB Created: 2021-03-30 15:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 39b9ed8fbdf30ca816186f35a8fc4aad SHA-1: 2e0fd3f204e89b1e21001eaa4e10a8e3c007f24f SHA-256: 2520bee9931bf4b6e43e5367c241a9d3a6aa701bbbacc2c1e10490b656935d4e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URL pointing to 'gimoguvi.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to research validity, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gimoguvi.ru/award?keyword=importance+of+validity+in+research+pdf PDF link annotation
    • https://cdn.sqhk.co/jesupasuzoku/2pRgdD7/fighter_jet_simulator_games_for_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sifilefu/zheihrU/nikowafebozedit.pdfIn PDF document text
    • https://cdn.sqhk.co/foxenikap/Nji8OsN/xekagu.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/chhgmia/space_engineers_xbox_one_servers.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/jagcgdY/mamelakajulagisawoji.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/hdii1gg/hill_climb_racing_2_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/Ghahhdl/werofavufix.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/OjbYgft/zinapulodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd9aa41-867f-4a05-8cef-c8ab5cb5a70f/mudipuvatoroganabaxufinin.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/77135753480.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/anonytun_free_app.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/google_chrome_for_pc_terbaru.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/xotodog.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/bunidesobarepotawegiw.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/6452232763.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/30906923758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5d5aa4-0423-4954-8b02-4d56bde39dbf/timirenodaxipebopis.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/aradhana_songs_free_doregama.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_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 5496 bytes
SHA-256: f0f5cb97394dc26623e237716195b0d71893d588837b41a465120c6fc2ea153d
font_01_sfnt_off0000faa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 10540 bytes
SHA-256: 8efde80e22f3c6762267cab8f252fcb382da220c96a30a74b8c153818d084755

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