Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d95295aaa71c22…

MALICIOUS

PDF

69.8 KB Created: 2021-05-22 08:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06d649103b2aac6e9fef027033d87a66 SHA-1: 924b6ed1659884b1ab29227a76d65d7d178577be SHA-256: d3d95295aaa71c22c87cdc7fcee50ae0c9ee0eb3233efcb7049d9492fa41faea
96 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs, one of which is presented as a lure related to spoofing phone numbers. The ML classifier and ClamAV detection strongly indicate maliciousness, likely a phishing or trojan delivery mechanism. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest the PDF is designed to redirect users to malicious sites or download further payloads.

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://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097a1419a752---67539171380.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3a398c347---49074499523.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0c6c29602---tixiluvopuxuzefi.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/1cfcc70253e8ce756948907141f069c5/48225839600.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/i8gceosnjc5moqd9m8o6hujqq3/5499388157.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/v580u4rcvii51820tkhhceluv4/bulakatajibesubisuseloseg.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/a3cp1asrekjhmv4rcu0q69j8fp/gidobu.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a456440e9da---zomanuzegamulijazu.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e414ef061d---34595442678.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079e1fcc5d82---72464478549.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/80b7d1a0bbb3260899bcfecd6f4f6a1a/27601722298.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f56e88a1f5---64325894770.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eddf3f3f51---besowokogipogamugudulirif.pdf
    • https://cmsschoolkg.org/userfiles/file/51400586261.pdf
    • https://bataretak.com/img/files/file/xetoko.pdf
    • http://karthikeyanjayaram.com/userfiles/file/7245566002.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ece359e937---60778608890.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+spoof+a+phone+number+on+caller+id
    • 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_off0000d490.bin
5efeca89bf6e62cddf91e80201d76662d57fe046e790b3094fa5ff3f7fdfb483		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD490 5588 bytes
font_01_sfnt_off0000e76c.bin
8d44b8686960d85f9a3fff1b1d5cb4def52076d00f452af24b83784ddcc53a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 10312 bytes

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