Malicious PDF — malware analysis report

Static analysis result for SHA-256 affc70148c097e5b…

MALICIOUS

PDF

83.1 KB Created: 2021-03-30 14:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57e7cdf45b27d7106b0241387b0b84d3 SHA-1: 88d04c9175ce1de2a90296709cb4c9dbdaf7c5b3 SHA-256: affc70148c097e5b041165c81b51f4f537da35e592d2db7624a42921644abeba
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, 'soxebez.ru', which is likely used to host a phishing page or download a secondary payload. The document body, though heavily obfuscated, appears to contain metadata related to its creation, suggesting it was generated by wkhtmltopdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/123?utm_term=bhaskar+the+rascal+film+songs
    • http://gtomishebs.xyz/resumen_capitulo_5_de_mi_planta_de_naranja_limaoaojk.pdf
    • http://medway24.com/gaggia_brera_spare_partskey3e.pdf
    • http://mydenverneighborhoods.com/23299983496bbtlf.pdf
    • http://liketime.online/gevoviz3nxjr.pdf
    • http://koreanluxe.com/16156445365cw5t3.pdf
    • http://vengriya.space/makita_plunge_saw_guide_rail_rubberds0hc.pdf
    • http://zipezaronin.iblogger.org/81110169048.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jukiwifid.rf.gd/zejarofotaradetaber.pdf
    • https://s3.amazonaws.com/gapivegek/asset_studio_android_studio.pdf
    • http://tuxijug.rf.gd/how_to_connect_canon_mg3520_wireless_printer.pdf
    • https://s3.amazonaws.com/jeromisixinolib/coloring_worksheets_for_kindergarten_math.pdf
    • https://s3.amazonaws.com/tomamujuf/38349454263.pdf
    • https://s3.amazonaws.com/wutezigojuxi/jobojuporejubolesadag.pdf
    • http://dutagewenurodub.epizy.com/xupabanovelijijikewepesos.pdf
    • https://uploads.strikinglycdn.com/files/072a0e02-3288-4098-84a5-c0fc0ab35715/zofixezuzilesokaza.pdf
    • https://s3.amazonaws.com/tesotiwapax/dofenidelufaxetubiz.pdf
    • https://uploads.strikinglycdn.com/files/12f126d2-f0e2-4fbd-bdb8-67581a5583fb/mossberg_930_spx_magazine_extension.pdf
    • https://s3.amazonaws.com/megodipewukitoj/dozobow.pdf
    • https://s3.amazonaws.com/tuzakifezara/jezaxosi.pdf
    • https://s3.amazonaws.com/wukevirenesu/20746884751.pdf
    • https://s3.amazonaws.com/jevopemosod/composition_of_functions_worksheet_5_answers.pdf
    • https://uploads.strikinglycdn.com/files/82ab1e24-e796-49b4-8471-df2feb811158/24711521847.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f353.bin
c37d469faaafcca1ddcc3a5a2d54f1ffa3551137ecfcaa49a16dffc98b8c474f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 5408 bytes
font_01_sfnt_off00010595.bin
d8222c5b40ebd63717f4c5dc8fc35353996042d8e1c703948dd5013035ac263e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10595 10456 bytes
font_02_sfnt_off000129af.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129AF 16164 bytes

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