Malicious PDF — malware analysis report

Static analysis result for SHA-256 d228a6d2ba8f51e6…

MALICIOUS

PDF

84.1 KB Created: 2021-06-04 01:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b5be33fd6fc306aeea09c55072c990 SHA-1: 9e685f3fd976469b7577c0c7fafe18f84b4a2c04 SHA-256: d228a6d2ba8f51e6931134dcceb0c260fde4826e24f49ba10dc23fd88229d82d
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to malicious content or download further payloads. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf, suggesting it might be a crafted lure.

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 http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d39df19f57c1428bb21f4555b3d876f5/bozorixifelitavujubejufu.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/398f627ed1b2e6fa44c98f916b7875ff/73561471562.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608134a393ba3---potunusofef.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/efd92bbcbad97632417365ce53b39462/93549981256.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c42501062---xamakikidikivigosekuvas.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/56f53e6fe970e8f29203a6e8d1d9bb2a/66663728121.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160700bc21372a---55847284618.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160af97eaac692---vekopobiponezelox.pdf
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608874b7eab37---lagexixaruzegalaku.pdf
    • https://soechi.id/userfiles/file/36197826650.pdf
    • http://abpaluso.com/upload/file/moluzapewubefopivi.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843e25d7a83---17684049073.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/ncb6vh82bss455mpmbbrkihvsu/61575812742.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11d6b8367b---15551152125.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd8f9b736e---zumaxazaxawidemo.pdf
    • http://technocom.pl/editor/file/vututinato.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=cartas+al+diablo+a+su+sobrino+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_off00010c59.bin
059682cb31007b72878a6432df6999f42c288e2a4ff7e02822e6e17241f3d7b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C59 5080 bytes
font_01_sfnt_off00011da0.bin
e403b6fda591e9efe0bb08eb408c67bd0447ec45d8ec70b389b351868e5d3244		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 11924 bytes

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