Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7141c61d8c13ebe…

MALICIOUS

PDF

120.4 KB Created: 2021-04-03 00:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e714e93931be9fc591e0db18caf4ebd8 SHA-1: 426ee2db22d18993508d3d813f0b7567d8e65c25 SHA-256: a7141c61d8c13ebe0035c91b49e7c8f146913f2a537b514f0f859dc07c3ec047
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious code. Several external URLs were extracted, some of which are hosted on disposable domains, further supporting a malicious intent.

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://xezojetit.ru/award?keyword=batch+file+scripting+tutorial+pdf PDF link annotation
    • http://lololoj.sportsontheweb.net/risuritadun.pdfIn PDF document text
    • http://nufudoze.getenjoyment.net/certificado_medico_bolivia_para_imprimir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450036/normal_606113a662eb0.pdfIn PDF document text
    • http://bajesiradevo.getenjoyment.net/befabonudiviminewofepe.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/casio_2688_gw-500a_manual.pdfIn PDF document text
    • http://kolekewoni.mywebcommunity.org/vabemomesarotonezivekawiw.pdfIn PDF document text
    • http://notanowid.22web.org/74475175764.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/what_is_lc_and_its_procedure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_6027efadea7d4.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/fumavawukejuberep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fararisujis.myartsonline.com/94891786364.pdfIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_fc49097c4c604786ae55ccdbc322e7a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e1c894-6a0a-4131-98c6-02381633102e/matlab_plot_multiple_lines_legend.pdfIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_e60c4f6570754ec59dd4a84fa5777116.pdf?index=trueIn PDF document text
    • http://kuxagevoze.rf.gd/3748205774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f45c60-70d0-4b5d-87a3-560ccb1743d3/best_price_eu2200i.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_55fca3db98874612b28e5f864b62225d.pdf?index=trueIn PDF document text
    • http://tulafixobokov.rf.gd/how_to_increase_height_without_any_exercise.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/36017820731.pdfIn PDF document text
    • https://6731adf0-0bfb-4e29-9024-dbf0b6c78d19.filesusr.com/ugd/163ed7_6adeb39e18f04d0fb141f512fba2b854.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45dd9361-c4e0-41c2-b59d-9166c373c8e9/2011_chevy_traverse_oil_capacity.pdfIn PDF document text
    • https://69f7c7ec-f776-4f8b-90c4-e8126cd531e3.filesusr.com/ugd/772020_92f6d4e04e954570b2d9ceef4c546209.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b9d8b2-1c14-42ac-b2fe-1a5c1580916d/nijipalob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6622b76-5f21-461e-81cb-850b2d9409f2/the_aeneid_sparknotes_book_3.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_off00019436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19436 5468 bytes
SHA-256: 828036424f6527b9da0e944d6eb6b0214f6cb107066dca672062131716a226d3
font_01_sfnt_off0001a6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6CA 12760 bytes
SHA-256: 61ffa3b92fe57253d63d850e512bf11e49df1a242579757991cbc4d3acb1b7c8

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