Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4669a5e5be9a89…

MALICIOUS

PDF

83.3 KB Created: 2021-03-19 12:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cbe9494d323bcfef5dd3547e1eab40b1 SHA-1: df5c01f9dac535ee901f336612d157a350873b07 SHA-256: cc4669a5e5be9a8901432724488b5fbc4fae1dbc854adfcf5631ca97ce18b1b2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/wix?keyword=how+to+use+craftsman+router+and+router+table+combo PDF link annotation
    • https://cdn.sqhk.co/torazanopuni/9hdWfic/nipibekugawolomutasubebib.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/mulibi.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/zigovotasuxurabu.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/OfggoSs/skiff_boat_rental_nj.pdfIn PDF document text
    • http://ninozefumuwu.iblogger.org/77282335476.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/lost_in_yonkers_movie_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_601bff78d7bdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5ffabf6023797.pdfIn PDF document text
    • https://cdn.sqhk.co/tipadasa/iih6gdv/daily_routine_checklist_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nivazesoj/jbhj7hg/claw_machine_teddy_edition_promo.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/speech_on_culture_and_heritage_of_india.pdfIn PDF document text
    • http://mewudaguzexo.sportsontheweb.net/turofimobefelokunobafugir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_60175f34a3e0b.pdfIn PDF document text
    • http://waliduv.mypressonline.com/flow_cytometry_bd.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/comparison_of_adjectives_exercises.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_5fe91bddb7c5b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fawipiro.rf.gd/install_android_emulator_command_line.pdfIn PDF document text
    • http://tavarifa.epizy.com/tazazosisodakif.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/how_to_find_google_location_history.pdfIn PDF document text
    • http://jifisuxevizek.myartsonline.com/30646391674.pdfIn PDF document text
    • http://tosuniwenalob.epizy.com/diccionario_caracteres_chinos.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_off00010601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10601 5360 bytes
SHA-256: f25639473dbdb4b36336fff2cbc04ef87930a84439a6a9179a3df1952568856d
font_01_sfnt_off00011835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11835 11112 bytes
SHA-256: 899c845cadb94d38a8285e8d39c070e97ad4f972774717c50cff7b0fab2bf4d5

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