Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2c66cc7d825d10…

MALICIOUS

PDF

102.6 KB Created: 2021-04-21 10:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 69489562b809e9722ec83d9bf8d1ccd1 SHA-1: 104d6effe85dc81daf9b8367967fc43663c353d1 SHA-256: 4b2c66cc7d825d10ba6c25b6730462600f394ea394335a8d0d317dff52b8197a
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a specific search query, directing users to a suspicious URL for potential phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/strik?utm_term=personajes+luces+de+bohemia+valle+inclan PDF link annotation
    • https://cdn.sqhk.co/toruwapelot/xgmihgi/xololonori.pdfIn PDF document text
    • http://xifamopituwoti.iblogger.org/11080928359.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/difejgd/3353846786.pdfIn PDF document text
    • https://cdn.sqhk.co/gizafimode/Ghb2hjx/playstation_network_login_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/mjdTIhi/idea_mobile_recharge_offers_online.pdfIn PDF document text
    • http://nunamekom.iblogger.org/el_regreso_del_caballero_de_la_armadura_oxidada_personajes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_c8922e0b8ac24ce3ac6e0ff6f5651900.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/64aeebae-f492-4d48-b1f5-9e97cc161f6c/75715907752.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/how_to_draw_a_multi_storey_building.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_acab0cb0af284ec3824dcda614106cc5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizedumi/22997463403.pdfIn PDF document text
    • http://wegulalavuj.epizy.com/86502674705.pdfIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_56239f8868914a3397b7e05d9b193264.pdf?index=trueIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_1d664db6260d473c9132f954b565fb76.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d72211-2e48-4dbd-865f-6dea8549644d/sony_a3500_release_date.pdfIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_bfa4fbc21705441fb0245aa017239b25.pdf?index=trueIn PDF document text
    • http://getidevip.epizy.com/netixori.pdfIn PDF document text
    • http://zivositad.rf.gd/rojeloteveji.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/metformina_oara_que_es.pdfIn PDF document text
    • http://mitoxewer.epizy.com/hedwig_s_theme_trumpet_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f603368-121a-4b1a-bcd9-f0c1fce55bda/94436548641.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_off00014fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FAD 5456 bytes
SHA-256: be2d931e20de76709188d29d018928aed9a8027e2ee5fad7d8852176a4603ca3
font_01_sfnt_off00016210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16210 13076 bytes
SHA-256: 86e715b6a3fa696cfb1c45153c0ce96d55bb758306996eb12fe1b82ab9ad15d6

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