Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c26f8ec2c3a088…

MALICIOUS

PDF

79.2 KB Created: 2021-03-20 17:59:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1d0d23da52bf69a7e31ac8c37af3ee9 SHA-1: 904509caa2d84e3cb16f90173d73e9f40fb47cf4 SHA-256: f0c26f8ec2c3a08813626f6d9510cf9562cd6c191a27a8155c4fa12c6c99a792
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI pointing to 'leonvi.ru' was extracted, suggesting a phishing or malware distribution lure. While no scripts were directly extracted, the PDF structure and embedded URI strongly suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=cbr+f4i+weight
    • https://cdn-cms.f-static.net/uploads/4482648/normal_5fd3516025f44.pdf
    • http://7gusevshop.space/vizekagevive4aubc.pdf
    • http://creamwalls.online/how_to_pray_for_my_husband_book8kg5f.pdf
    • http://itravelgr.com/toshiba_dvr620_troubleshootingul4yx.pdf
    • http://gosasumimak.iblogger.org/nuzenawaxiwiwopixo.pdf
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5fcfa1af8641a.pdf
    • http://endi-itali.space/xosoti16g2n.pdf
    • http://xozezezimej.iblogger.org/78437416605.pdf
    • http://koreanluxe.com/libro_de_espaol_actividades_primer_grado_1993_para_descargarndtyj.pdf
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5fe8f502174d0.pdf
    • https://cdn-cms.f-static.net/uploads/4479433/normal_601b2d546adaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_1174a91c301f45e18d46c66431f86534.pdf?index=true
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_4e1d757d1124407eb40af56f866fcb27.pdf?index=true
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_138806211a214d978afff9fe5664458d.pdf?index=true
    • https://s3.amazonaws.com/wizitifowubux/do_ikea_sell_spare_parts.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/71057282690.pdf
    • http://zefitog.epizy.com/ambulance_care_assistant_uniform.pdf
    • http://damufabenipete.rf.gd/60484546741.pdf
    • https://s3.amazonaws.com/nafamaragisek/62331554145.pdf
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_2fb3887c6ed04d269f1df2c9c618dab4.pdf?index=true
    • https://s3.amazonaws.com/dapekufoxiraku/sofugomupu.pdf
    • http://togipumenotu.epizy.com/4876361731.pdf
    • https://s3.amazonaws.com/sonutopexaramuf/autism_fact_sheet_uk.pdf
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_c0e83bd6ef454ea5a35cd27613823ca9.pdf?index=true
    • https://s3.amazonaws.com/jivuxo/a_reason_the_renaissance_began_in_the_italian_city-states_was_that_they.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_off0000f7ba.bin
2d0f2def02d20448be25c754baf81b7739b39c9a8259bd0016bb29ddae4a0b3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 4836 bytes
font_01_sfnt_off00010845.bin
c546968657fb7c1e10ef7f59ddbb1c3792768a063a5b7cbb8dcd4fb16a05fdb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 11832 bytes

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