Malicious PDF — malware analysis report

Static analysis result for SHA-256 65af3c14efc6634e…

MALICIOUS

PDF

102.6 KB Created: 2021-06-29 07:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 44b3bd45441ce7bbb2ecb7e18160dcbb SHA-1: 9d89032db079c506777ae92655bcad323cc295ae SHA-256: 65af3c14efc6634ec9cba2fd0014c288d2d22442fa655c7856c402282ea95be2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a link farm with numerous URLs, including one pointing to a compromised WordPress upload directory, suggesting an attempt to host malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/5be9d8f24fce81cc2c3fb71d451da11c/gaxoduzemev.pdf
    • http://andlupa.com/userfiles/file/40779013653.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/df44f0f3d982b23342abb1eacaa5d343/gosatugusif.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/uovg7euuic1nbckkq40q2erl87/xarugat.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080f2a24b788---33797198628.pdf
    • http://e-kva.ru/admin/ckfinder/userfiles/files/godenibo.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c069a23b495---68564695058.pdf
    • https://www.alapan.org/fckimages/file/62246661356.pdf
    • http://brainbond.ro/userfiles/file/wotulif.pdf
    • http://robwalker.net/fckupload/file/fibitowakolijeg.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/62411cb5820f28e4170a662977dff424/gobogasutajixune.pdf
    • https://pjkconstruction.ca/images/file/rulutofiwaj.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/f5b1a4a04c5d162beef159bfd025e597/67461005959.pdf
    • http://adabaskimerkezi.com/upload/file/75472263280.pdf
    • http://iphonedown.com/ckfinder/userfiles/files/64223490818.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/2866948802d03eee02dcf24769639484/depakepulog.pdf
    • http://interel-rus.ru/test/sites/default/files/file/luzilosif.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/3d17a18f047166094ecaa40c3a9b55ff/zatafasadubiteron.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160949d4a855f9---72482697789.pdf
    • http://romanakladatelstvi.cz/userfiles/file/setagovi.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/7ee5ee5frgv04rcho1lco6lrjg/54587226936.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/a1snq8k0h2clpptc0qjg6aom8k/sarozoveli.pdf
    • http://goldnumber.info/userfiles/file/dimowowog.pdf
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/39663074452.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/7d5b9d7e6c5bb485c456ed4f8c6a650d/gemokifobojoruvubadogese.pdf
    • http://agendaalzheimer.org/files/galeria/files/bowilituxowujujina.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=is+sourdough+bread+good+for+high+cholesterol
    • 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_off00012ba6.bin
b2abc7a98ad85b7b227fc9886f20a19e0f840d243a3fe8728c3f875a6b8b1f6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA6 17560 bytes
font_01_sfnt_off000159ac.bin
015840432e90dfdf4f63eeaf02ab2be97952673b9b0b4f1e1504a1676df9b995
pdf-font-stream PDF embedded font (sfnt) at offset 0x159AC 10844 bytes
font_02_sfnt_off0001729c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1729C 16792 bytes