Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fb1eef8df6b9e9…

MALICIOUS

PDF

80.2 KB Created: 2021-05-04 07:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fe4482da665bef08fd81e1cbce8bd5a SHA-1: cd2835cb9459e8a4fb86b1634a317c73debb3ca6 SHA-256: 97fb1eef8df6b9e99339d4e2ffeb7e957af03019813493c896c85de43937b86c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs and a heuristic firing for PDF_SEO_DISPOSABLE_LINK_FARM indicates it is part of a link farm. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to interact with the clipboard in a way that could lead to command execution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://dugedepap.ru/strik?utm_term=what+days+does+starbucks+pay
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5ffaa7294f72c.pdf
    • http://mirror-x.org/121755571101dacs.pdf
    • http://passive-income.ru/povanumifapogoz2e66i.pdf
    • http://viwesisikumebi.getenjoyment.net/latin_affixes.pdf
    • http://kajuzumanaz.sportsontheweb.net/7604377354.pdf
    • http://yogait.space/demonstrative_adjectives_worksheets6ubwe.pdf
    • http://quinzsy-studio.design/208680336514ov1g.pdf
    • https://cdn-cms.f-static.net/uploads/4489730/normal_5fd7910dc3843.pdf
    • http://xofebuledat.scienceontheweb.net/xetatali.pdf
    • http://jidapuxedepu.medianewsonline.com/how_to_hook_up_bose_cinemate_series_ii_to_tv.pdf
    • http://yewes.space/yamaha_rx-v667_service_manualgnvvm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zuvuzevo.atwebpages.com/gewiperefovo.pdf
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_a864adde5fa642af81b2a64a54cd3879.pdf?index=true
    • http://xirozaza.onlinewebshop.net/60957745303.pdf
    • https://beca70af-11ea-46d2-a649-d7fd44c468ee.filesusr.com/ugd/dd41e2_2a6514b493b144248a166789361c43fd.pdf?index=true
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_e68fc9846a124bfd8347c611fe24540d.pdf?index=true
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_b389a37e2c5a4012bd504a847261ba63.pdf?index=true
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_850cdd96782c448ebd1702a8c2fecd62.pdf?index=true
    • https://7054f9d6-44ea-4b6c-8535-0d04e7cb9957.filesusr.com/ugd/963b03_a79a7bd6bf2f442c83b9a9a453409941.pdf?index=true
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_681127fbd62542a9b67577a7a85115f5.pdf?index=true
    • http://vusedew.myartsonline.com/protected_areas_in_the_world.pdf
    • 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_off0000f7be.bin
0bc6926e376b6e6eaf3453edc4505a388ccbb52a38aeeb718e318efd64b096ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BE 5448 bytes
font_01_sfnt_off00010a50.bin
b0daab80e4125e9360b6079df0842de3fa7d23c1154541c306159e552cd30a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A50 11584 bytes

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