Malicious PDF — malware analysis report

Static analysis result for SHA-256 12994f4165250bb6…

MALICIOUS

PDF

82.0 KB Created: 2021-02-25 19:59:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 240b1fbadc00577d99a09f9f1c3e5df8 SHA-1: 9d299fc25f8468e3a89837e7f1346183011ce51a SHA-256: 12994f4165250bb6be78a78daad1f659d3de872c5a83fc9e2c06eb35ec5d2ba2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to an instruction manual, aligning with a phishing attack pattern.

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://bologen.ru/123?utm_term=spy+pen+camera+instruction+manual PDF link annotation
    • http://dress-russia.ru/home_interior_design_software_reviewssmnyi.pdfIn PDF document text
    • http://car-den.ru/academic_writing_processmadr8.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/ijGjb9n/real_chess_game_download_for_windows_8.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/is_international_mail_coming_to_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/iaJhjri/43491934270.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/ljihfC7/does_frndly_tv_work_on_samsung_smart_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/he02dji/bawuxutaxovomudexisiluvo.pdfIn PDF document text
    • https://cdn.sqhk.co/legesizas/hhw7gfF/40973446277.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/gTpOMid/23815560520.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/41735233977.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/Ig7Njin/galaxy_watch_active_vs_active_2_review.pdfIn PDF document text
    • http://erogan-encolumbia.site/dsc_1616_quick_reference_guide8zuk3.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/wwihw2U/supercars_for_sale_florida.pdfIn PDF document text
    • http://apple-fruit.space/riwirevrlbp.pdfIn PDF document text
    • https://cdn.sqhk.co/wovedajuraki/5bfiajg/41448512081.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/hhUDiaV/22891165163.pdfIn PDF document text
    • https://cdn.sqhk.co/xapewiwud/jhSieja/critical_strike_global_ops_crazy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/hi7ACje/51537443072.pdfIn PDF document text
    • http://rewita.fun/45655727036rekcr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF683 5164 bytes
SHA-256: 96aa7d03bd549e0bc313a1613d4d7277bdb69e9e767ca660698a1cc193c2eb08
font_01_sfnt_off000107f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 10544 bytes
SHA-256: 81f052911930bf8ed2b4fd8d06f287440e04f3f2267fb41a9862a757c4ffbf2f
font_02_sfnt_off00012c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C16 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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