Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b8c3802a9136e0…

MALICIOUS

PDF

74.5 KB Created: 2021-03-23 06:25:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 40469da65e4faef3951c8499dc3877df SHA-1: 7b6b748cb038b93b20fa482bdbb186bfe3fcb010 SHA-256: d5b8c3802a9136e0f9776d03ccb96ba423bd6373aa969901a5dd6416ac95cbaa
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to a phishing site or download further malware. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/strik?utm_term=how+to+program+dish+network+remote+20.1+to+receiver PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427514/normal_6007ff7bd8667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5fcdd085695ea.pdfIn PDF document text
    • http://voiprormul.xyz/why_investment_banking_wsoyzqa1.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/ibWieRn/classic_car_driving_simulator_mod_apk.pdfIn PDF document text
    • http://wamabivunufoteg.medianewsonline.com/assamese_poem_book.pdfIn PDF document text
    • http://nonretloli.site/62585132802jwyeh.pdfIn PDF document text
    • http://vinnipoh.space/46374114539wi3w.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/72339493939.pdfIn PDF document text
    • http://vorgazme.com/tafsir_ibn_kathir_arabic_downloadqfdws.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/86293695614.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/kf4XyKk/ornate_picture_frame_template.pdfIn PDF document text
    • http://white-x.fun/what_are_the_most_popular_diy_projects397ss.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/povenexisuzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_6026c0d23b4c2.pdfIn PDF document text
    • https://cdn.sqhk.co/goxufime/lghghJD/formula_1_qualifying_tire_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/hdheQJT/cheap_indoor_paintball_near_me.pdfIn PDF document text
    • http://firstsecu-paypal.com/innovate_uk_funding_guideslm54.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/jhaRjjH/80061449139.pdfIn PDF document text
    • http://nashremont.site/retro_nes_emulator_descargar_apk00g57.pdfIn PDF document text
    • http://film123watch.com/18453023143jznal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_6034472545ffc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://palelezugob.onlinewebshop.net/how_to_attach_dishwasher_bracket_to_granite.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/rifamafotefe.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_off0000e52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52F 5992 bytes
SHA-256: 439f1db8c4d305c766b784be2a233410122e8d6f9b2bf3bcb1fb0d7ff2a7b595
font_01_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 10128 bytes
SHA-256: a95555bd317c24544e7c333901a97b278361b49c185c4781c28781d2f391687b

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