Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9dc52b264c72fe6…

MALICIOUS

PDF

78.1 KB Created: 2021-04-16 11:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed4ecff3584d14c9da8618802397d97d SHA-1: 3e3ccb84c96b6274531e703e4ddcf02eefbe2643 SHA-256: c9dc52b264c72fe681d875d9a17ffb6b473fd73fb16a14be50af3e3a362aeb74
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a site related to treating infections, likely a lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of an external URI and the overall classification suggest this PDF is designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=how+to+treat+cellulitis+infection
    • https://cdn-cms.f-static.net/uploads/4379618/normal_60491cee61e04.pdf
    • http://gapilojazixo.getenjoyment.net/builders_warehouse_catalogue_2020_download.pdf
    • https://cdn.sqhk.co/lelogivotosu/PgfChd5/lorobat.pdf
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5fd2898eb6852.pdf
    • https://laxigozi.weebly.com/uploads/1/3/4/3/134361341/f4a5847b85ac.pdf
    • https://xopoloxunevagig.weebly.com/uploads/1/3/1/4/131406528/8a66f2af0e6141e.pdf
    • https://gejidodedawo.weebly.com/uploads/1/3/4/0/134018108/5bd35fa5f.pdf
    • https://jixusalozexifan.weebly.com/uploads/1/3/1/4/131407855/xafagajilu.pdf
    • https://cdn-cms.f-static.net/uploads/4449178/normal_5fd9639c79a90.pdf
    • https://juxeduwabup.weebly.com/uploads/1/3/0/7/130775558/46c3d77.pdf
    • https://cdn.sqhk.co/xogudililavo/ifwrjcP/relax_river_vr.pdf
    • https://cdn.sqhk.co/modonasuje/uzhhrAK/94707687279.pdf
    • http://motarojetox.sportsontheweb.net/17055671654.pdf
    • https://cdn.sqhk.co/jekefebiba/PjdZPAp/armageddon_gear_game_changer_og.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gofosuxubajo.epizy.com/derivative_rules_worksheet.pdf
    • http://ravitujupap.epizy.com/azure_data_studio_notebook_to.pdf
    • http://zifopira.rf.gd/gulolowivu.pdf
    • http://familule.epizy.com/pilofimadurusave.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_off0000f2b3.bin
33e1cbd931303d5c6677a49aacd3fb8af714623236d236c9f3028b5a5f78fc21
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B3 4928 bytes
font_01_sfnt_off00010394.bin
6511cb9490df98d34495b9d0136e09117b48e01e94a8099d33d31de66d9ad86a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 12444 bytes