Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0fb2c47bfeb2c66…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 12:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 83ca338cbfe6c47690c1cefdee1cf0d3 SHA-1: cf63a256aa3413998e0e0662f2319c1e9058f265 SHA-256: c0fb2c47bfeb2c664cbed99c91c2fafafdef09a7c09f0c3a0d12198a5b579a9b
134 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is designed to host multiple links on disposable domains, likely to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/wix?keyword=road+atlas+pdf+download PDF link annotation
    • https://cdn.sqhk.co/gobavata/djagcxD/rush_delivery_tracking.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/dolesavepevegoso.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/onpWiip/vuzolixasagaxapipekur.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/jcAEggE/resistencia_microbiana_definicion.pdfIn PDF document text
    • http://doordash.link/90354574802v18g3.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/cvc_words_list_for_kindergarten.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/bFhd8tV/top_trending_music_videos_this_week.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/ib1OLbD/wunerilikuza.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/7fgehHd/the_midnight_game_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/kemuxilajig/D4hggd6/cardiology_coding_cheat_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kebisozakola/cjfqihh/atualizar_whatsapp_via_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/8C66P8l/bowl_over_meaning_in_bengali_language.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/Zhd2rHN/kutolilijifevu.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/wezelaposorodbmogm.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/hcoii7p/hp_smart_app_for_chromebook.pdfIn PDF document text
    • http://wopizup.mypressonline.com/animal_anatomy_drawing.pdfIn PDF document text
    • http://wijutomotagam.mypressonline.com/sc_dmv_forms_for_real_id.pdfIn PDF document text
    • https://cdn.sqhk.co/jiledexuda/Uv7xjfI/favovilupusememusajax.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/f3RFoDK/cash_n_go_huntsville_tx.pdfIn PDF document text
    • http://creditreportfast.info/dark_souls_2_fun_weapons_pvec9i9s.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/d67db8dd-c6a5-4530-a8e5-d244d38afd7a/how_to_install_a_rinnai_gas_hot_water_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aed6c8f-a8b2-47c3-a1d4-ae6a81095982/mexoledeteteligi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a350dc3-38e7-4b25-8637-02cb7ce877b8/cabrio_dryer_f1_code.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_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 5036 bytes
SHA-256: 29f17bfdc32c5e29ec7ce42b991ca9af48b85d477703119883ea077d2a98e78b
font_01_sfnt_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 11312 bytes
SHA-256: abf82039976460caad52028b16acb0174aaeafe7a4fb3ebc6990ba7642a2569c

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