Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa9a59171786276…

MALICIOUS

PDF

88.1 KB Created: 2021-03-31 20:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08111dc0507664ce8ea14a400817e1fe SHA-1: c0b3563f6e3b8a65a13980696c570fd6284f5b77 SHA-256: 6fa9a591717862762b675870667c3798173befa02b5f524afea8bb487703d929
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to identifying rocks and minerals, which is inconsistent with the malicious nature of the embedded links.

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://kuzutuzo.ru/strik?utm_term=how+to+identify+rocks+and+minerals+app
    • http://tujubafi.getenjoyment.net/vamigatimisutazukudofo.pdf
    • http://tixaman.scienceontheweb.net/jadwal_sholat_bandung_2020_kemenag.pdf
    • http://azalea.store/35531900745ncq73.pdf
    • http://pusatokolerax.mywebcommunity.org/83323562991.pdf
    • http://vizemezezu.sportsontheweb.net/tadzkirah_ahmadiyah.pdf
    • https://cdn.sqhk.co/xubupigegi/9l8nL8j/electrical_circuit_design_software_open_source.pdf
    • http://rubewox.sportsontheweb.net/what_is_presentation_of_self_in_sociology.pdf
    • http://mavpa.fun/974701867553xdj2.pdf
    • http://trening-ekaterinodar.ru/suntrust_international_wire_transfer_swift_code9bnc5.pdf
    • http://lowufadit.scienceontheweb.net/newejejaf.pdf
    • http://vinnipoh.fun/why_is_my_beko_fridge_freezer_not_workingg3pd8.pdf
    • http://vemelaribox.getenjoyment.net/89894656217.pdf
    • http://24goodstore.site/vonizenokabudonlb6zr.pdf
    • https://cdn.sqhk.co/moserusoba/Mmiaghf/happy_sandwich_cafe_contest.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_54116b9659774885abc6d5b331beb080.pdf?index=true
    • http://gurabagoderes.atwebpages.com/soweludotaluvidugirul.pdf
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_beb71d455d634c009583b60fdefb7755.pdf?index=true
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_dbe1c31103254ecf85829ac4b4f11f04.pdf?index=true
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_0826897dd3024a24988f88a7c95e6052.pdf?index=true
    • http://fazegujopazoj.atwebpages.com/caballito_de_mar_caracteristicas.pdf
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_7bf3cc029fa44a3bb5f6927486f095b1.pdf?index=true
    • http://sabiwilurase.atwebpages.com/11317614675.pdf
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_5e64293f22404124ba79e7bad7c83d61.pdf?index=true
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_db3e38ef95a9450181ef3786f17292f5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117c0.bin
300147ab27cd7a180ad39a0a61f93bd70e31f7d7e8de6a1ac28670232796a5b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117C0 5520 bytes
font_01_sfnt_off00012a8d.bin
bc24b882c78c76e03a2b3eca12cb2c5e5e226d782dbd087fde7cc56f2fc6dfaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8D 12424 bytes

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