Malicious PDF — malware analysis report

Static analysis result for SHA-256 964cd461e591f6d4…

MALICIOUS

PDF

83.1 KB Created: 2022-05-30 02:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 6dac399418ae45428ee6093104063740 SHA-1: ac2f636e2c3a2d4c61c29c35dadde2ec58f2ef92 SHA-256: 964cd461e591f6d460e55ab5685c91e007a4f7e301b4f5ace9f84f86f183f4de
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'yubit.co.za', which is a strong indicator of a phishing or malware distribution attempt. The PDF structure itself does not contain readable content, but the presence of the external link is sufficient evidence for the attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yubit.co.za/YmrXLWy8?keyword=2006%20ezgo%20txt%20owners%20manual%20online%20pdf%20search
    • http://www.groupkms.com/ckeditor/kcfinder/images/files/90073332480.pdf
    • https://www.cvr2021.scrs.in/kcfinder/upload/files/gofikinunalimasikugope.pdf
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/seloraji.pdf
    • https://wivixilor.weebly.com/uploads/1/3/4/3/134371520/sidumopigu.pdf
    • http://miu.by/userfiles/24186621773.pdf
    • https://oilbasaro.com/web/images/ckfinder/files/20220227074748.pdf
    • https://projektovanje.info/userfiles/file/40490316764.pdf
    • http://ei-windykacja.pl/upload/file/taroserazezetejozanofa.pdf
    • https://coachhouse.info/assets/file/85992859379.pdf
    • http://outspokenholland.com/userfiles/fckFile/20220411135023.pdf
    • https://lukeboxasuxij.weebly.com/uploads/1/4/1/5/141582118/gonuranetovomifezoji.pdf
    • http://theblare.com/image/upload/file/56686395457.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621c100fbb544---legiselakasugumusa.pdf
    • http://www.hgekc.com/media/userfiles/file/pilalirijibige.pdf
    • https://xotubowewetiner.weebly.com/uploads/1/3/2/6/132696149/biripefamowogedamem.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/162700722c902b---sudejufu.pdf
    • http://kp-bs.ru/upload/files/volurinojitemapopaki.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/162774d3c2c0f4---57837295220.pdf
    • http://budoprojekt.eu/obrazy/file/18947406907.pdf
    • http://rideco.hu/upload/file/40804120791.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://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_off0000debd.bin
95c3a0a61c60e4c5bf196eb8fede7244d6006bd57d5e26a1bc51e99a3830f08c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 11728 bytes
font_01_sfnt_off0000fa77.bin
16ad34c71340e7c8b27ed79044af270926bef5f8b30c7feac5f349e5726f7bd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA77 16820 bytes
font_02_sfnt_off00012640.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12640 16792 bytes

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