Malicious PDF — malware analysis report

Static analysis result for SHA-256 d677371a3f60245b…

MALICIOUS

PDF

73.7 KB Created: 2021-08-29 03:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: c2bc1272b7fe5598afff8ac066518ec0 SHA-1: 313b3a880c97b30f491fb200baf39fc25ffae09c SHA-256: d677371a3f60245b1707b97aa0fafc862b51f137df58c096e3906a182f7a8a2b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs and embedded URLs. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the overall pattern suggests a phishing attempt directing users to one of the numerous unknown URLs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/a4a8717f6275c3af0527fa89c862b2f2/39326353019.pdf
    • http://ambcavallon.eu/userfiles/files/bipidoseratifafokapumuxe.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/c57f79f564d4e60ef072f73ad17d72fb/7087643104.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607887b5add70---roforilirejowuzidijanu.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077baa573e08---kewejodapovukabu.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160e1b9170596b---sofagaxetawowip.pdf
    • http://alliusie.com/userfiles/file/nilileboburafi.pdf
    • http://k3projekt.pl/uploads/userfiles/files/xopofitugagotumikafu.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d24cef1cd71---buvagogofidinaromax.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16114867655435---jaxepinogazi.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aea5eda2663---vanubukikeg.pdf
    • http://netisiletisim.com/guvennet/resimlerfiles/49432185477.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/sp15fh4uc2ru5vai650rh2tdqk/93014940922.pdf
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/tojigukut.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/29074570394.pdf
    • http://tunglamgarden.com/images/fck/file/36814211443.pdf
    • http://bscsaoner.in/ckfinder/userfiles/files/37241123106.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e50e51190efd768e7d35ee55eff70fb9/xumilukowumepaf.pdf
    • http://atallmed.com/userfiles/files/ronuwas.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/67bc232ff40b93e524e7adabffe4d18d/16488981025.pdf
    • http://phuongninhphat.com/uploads/userfiles/file/mupoxilivubozimevenamaxo.pdf
    • https://ncsccalgary.com/userfiles/files/54911249336.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=interval+notation+of+piecewise+functions
    • 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_off0000bccc.bin
a113063b6e9089cd3670cf09c664a38da109408af9660b4f0636602ea71a5017		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCCC 10676 bytes
font_01_sfnt_off0000d57a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD57A 16792 bytes
font_02_sfnt_off0000ed8c.bin
ce1afbf13318ac5ecc47a3570781c5117a4f542a02c69b4c48440a3c5904006a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 16976 bytes

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