Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b913c0fc92925b5…

MALICIOUS

PDF

88.4 KB Created: 2021-07-01 11:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 28c83c62ac58809b8e7e6c772f97e036 SHA-1: 668ccc234db848fa4da863c49f3c1f3f04d06d0e SHA-256: 4b913c0fc92925b5c4676d673e33c4cd3d0ad8fbecdbbec1248f9a7e0af37194
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that point to potentially malicious content, suggesting it's used as a lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d3ad2ccff---78501875424.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/a9152be1aa0fd5b0aafad65e9850efd1/sofarafogago.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a74f12a106d---zasoxuk.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbba21e1f27---pikelorewukuwemisofizo.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/u184h25kg81lp39j5c7sudmjl2/36620485255.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/c6f8267482fac38093aa16139b5e17e1/58677896467.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160709e7864a45---belojokonujanakedibaka.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/8ev1kpvif2bp0otomvhtlsqun0/bijabivabakudasuwegal.pdf
    • http://alumcity.ru/userfiles/file/kosunutarezetagegaj.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceec747724---jiwofuwun.pdf
    • http://oldtimerclub-thueringerberg.at/images/file/gubodafadotunoboko.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/73f84d1e3073bfab6778968ae72233a2/13523471713.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fc202fcc8---dunovatikosedozo.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a05d1bad45c---39570932379.pdf
    • http://perchegouet.com/ckfinder/userfiles/files/77518108632.pdf
    • http://alumcity.ru/userfiles/file/lakijavapesozokusimutaw.pdf
    • http://sitoad.com/bbqjoekey/files/202106041032181423.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9340ca5d7d---67099623046.pdf
    • http://wohingltd.com/userfiles/zijivevezeronikizizom.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084193a05f86---bafiwowes.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d77132e0c7---57231787202.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a033e6f406a---60671724471.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=another+word+for+modify
    • 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://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_off0000f5b1.bin
f58326671561c816013e0b371bdc2317b9ad19655ea2d4a5f31e3f7947f275a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 17540 bytes
font_01_sfnt_off00012378.bin
cde7d25522ebe173b1cfb0a42b2f9ce783e21ac2287dc0cf5954f66b42723c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12378 10424 bytes
font_02_sfnt_off00013af7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF7 16792 bytes

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