Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbdd3c322c4f0434…

MALICIOUS

PDF

77.3 KB Created: 2021-03-30 11:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ff0d71b186fb0603a6ad48dfa6e59921 SHA-1: 71576d867bc79f692323d31d325d138f0c6d98a6 SHA-256: bbdd3c322c4f0434cb56732a1cdc5902ea38ac23f91e1a764adb5445718793ee
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://crophysi.ru/strik?utm_term=what+are+the+physical+features+of+the+atlantic+ocean', is flagged as malicious. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to redirect the user to a harmful site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=what+are+the+physical+features+of+the+atlantic+ocean In PDF document text
    • https://cdn.sqhk.co/matezafun/ysbIhgx/daily_machine_maintenance_checklist_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383308/normal_5ffffa3ff0e97.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/ohehb53/fortnite_black_hole_mini_game_code_xbox_one.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413718/normal_605a6eacccdce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415068/normal_602c908a863ac.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/xarobutufeti.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/88791782723.pdfIn PDF document text
    • http://topplafond.xyz/donizanuwtorp.pdfIn PDF document text
    • http://fb-ig-violation.com/what_is_the_central_theme_of_the_story_yellow_fishmi55p.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/B3RjjDJ/3d_car_simulator_games_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxinugokas/c7ifFic/valunogorodejalozewowobi.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/cSiiHge/dupezejux.pdfIn PDF document text
    • http://manovina.mypressonline.com/los_agentes_economicos.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/farming_simulator_2015_xbox_one_cheats.pdfIn PDF document text
    • http://imkl-checker.com/50951872535fvs1u.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/gapivegek/little_wing_eric_clapton_steve_winwood_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/70240638585.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/mojepezodewenawikirifem.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/nj_attorney_general_use_of_force_report.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/badlapur_full_movie_hd_1080p_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/bersaglieri_uniform_ww1.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/wukipizazetemirizobol.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/63757561168.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_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 5216 bytes
SHA-256: b4396b53694a5c55e874d6d55ab75eaba11be7a8abaa9f51dbe359f99526fa8b
font_01_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 10688 bytes
SHA-256: d140b11fd7edfc84ac5d4eac3c945accfabe19326d259116b8cb43fb9e1d4bf5

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