Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce52fa8fe3b281ac…

MALICIOUS

PDF

81.2 KB Created: 2021-04-20 19:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fe85fc2da06ae9a1d4eb71135669c7dc SHA-1: 22d0636ab47bd5c7df7bbea480f959b2f14b7a82 SHA-256: ce52fa8fe3b281ac8d33fadbeda68bf61fa1236e985ad2630a8d4a6c1d247993
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to suspicious domains, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of numerous links and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic suggest the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+to+connect+amazon+echo+show+to+bluetooth+speaker In PDF document text
    • https://cdn.sqhk.co/kidatufo/cygyvq4/73869398.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/social_phobia_inventory_scale.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/ifoijij/dragonpass_lounges_heathrow.pdfIn PDF document text
    • http://waystep.site/54923405262s51a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501495/normal_60020835f0870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446496/normal_601b6d7586148.pdfIn PDF document text
    • http://texno3ua.com/what_is_an_inflectional_affixjmpma.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/bkldeig/jawaban_game_brain_it_on_level_51.pdfIn PDF document text
    • http://omoikiri.info/lenovo_t430_docking_stationdufpa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473388/normal_5fdf2ddaa72df.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/S4pifUR/70167139177.pdfIn PDF document text
    • http://leree6.club/how_to_reset_to_factory_settings_my_motorolarh0f8.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/riesgo_relativo.pdfIn PDF document text
    • http://vixabaj.scienceontheweb.net/isometric_graph_paper_printable.pdfIn PDF document text
    • http://tanivikovome.sportsontheweb.net/lazigu.pdfIn PDF document text
    • http://ing-cliente.com/chandamama_kathalu_books_in_telugu_onlineoz326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419630/normal_5fe02d74b17a2.pdfIn PDF document text
    • https://cdn.sqhk.co/vurikede/Fhciggh/screen_recorder_android_that_records_internal_audio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_6023622c9f5d8.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/dfbd94ba-469a-4f53-b880-808cb8c1c99f/what_does_ecological_niche_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/35841653210.pdfIn PDF document text
    • http://jaminuzifibe.onlinewebshop.net/hikvision_cctv_price_list.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/juniper_switch_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/ganup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795f8aaf-2ca7-4318-8e31-47fb0ab9e914/how_do_you_stop_trichotillomania.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e19907ad-d348-4c36-a477-36af7b0fa5dc/juwabele.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/condor_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/appvn_app_old_version.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_off0000fe0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0F 5480 bytes
SHA-256: f4de3a92efc0cbef491e7c3e8ac84366f2fb1f2ea95cd37eb803cce22348f1b1
font_01_sfnt_off0001109f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109F 10992 bytes
SHA-256: 8c38f2369a5054175c046948094771f94c5d9a3963518ffda1480cd08fdbe24f

Open this report in the interactive analyzer, or submit your own file for analysis.