Malicious PDF — malware analysis report

Static analysis result for SHA-256 a045922b4837f379…

MALICIOUS

PDF

76.4 KB Created: 2021-07-03 09:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4b2ae17b678a29d0ef47a9b75c837e5 SHA-1: dac10a6b4f6701405221d551cf72f53fb5c7026f SHA-256: a045922b4837f379a0cdaa19b6d3aa59781351c1b0c06173dac74964d6bc3e54
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF with a high ML classifier score and ClamAV detection, indicating malicious intent. It contains embedded URLs that likely lead to further malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading or visiting malicious resources, fitting the profile of a phishing or malware delivery document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16070db8c04577---92487520277.pdf
    • https://beautyyaurient.com/editor_upload/file/zenazopikugifir.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d6bf4e596---gelilufoxi.pdf
    • http://austria-ex.com/images/blog//file/94224853657.pdf
    • http://hyundai-dongdo.vn/images/files/jebovubamobuzevizuva.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/d350752ddaf8b5d7dbf5172bb2ea6b05/dezavori.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/a2179e10bb38956dff4652122c24bfeb/lezixekupizivowuvan.pdf
    • http://farmaciacogliate.it/userfiles/files/46473957266.pdf
    • http://sunnysolutions.it/uploads/assets/file/detatemijinifo.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/45bdf4440397b56265c5f7518c60bd77/firajipinosefizar.pdf
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/67365487676.pdf
    • https://alianzatours.com/imagenes/file/84027993523.pdf
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26460584514.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81f2c162b---66289859365.pdf
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/xemubotewe.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/qnclum7o293p0cm49fglaqec66/12956001418.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9832e6027---92532593696.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d757b3048---45848319589.pdf
    • http://anthonyvienna.com/sites/default/files/file/pudopabavagesukenik.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858bce30678---jokufejagogox.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=third+pentacle+of+the+sun
    • 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_off0000c602.bin
dcf247c64481bbe24064ce5267086fb4c51648206dfa69b0d734b099a4c2fe6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC602 17244 bytes
font_01_sfnt_off0000f299.bin
c54353ab441b5dd81c5263bc4d3fe14c6de3a15507854b4aaf218a3216b8e18f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 10780 bytes
font_02_sfnt_off00010b5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 16792 bytes

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