Malicious PDF — malware analysis report

Static analysis result for SHA-256 489e2ed50d7f3d75…

MALICIOUS

PDF

72.2 KB Created: 2021-06-30 10:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4d1cef1ae580e254a98dcf5ea8a702c SHA-1: f3120d298334a1ab3b04751f2b76dbab8e072ebb SHA-256: 489e2ed50d7f3d7509494e98514e096489e36b5edb28452eadf0ba03fe1d5856
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript, which is a common technique for executing malicious actions within PDFs. The PDF also contains numerous external URIs, including links to compromised WordPress upload storage, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bombapin.com/calisma2/files/uploads/vigolapozifif.pdf
    • http://pusancard.com/userData/board/file/bozimuzizexa.pdf
    • https://ystechpro.com/nbloom/fckuploads/file/dawakipo.pdf
    • http://garageanything.com/js/upload/files/livesolunaj.pdf
    • https://toromecanicorodeo.com/files/fasuvax.pdf
    • https://commonwealthsportsawards.com/userfiles/file/kupuwovo.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160abf3721af16---27180898610.pdf
    • http://www.moyekolodin.com/files/volukoxuselaxad.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/9l6i9jccribu673qdn60g523f5/kirifodoxazim.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/9161def72379c579312c0cff6568cc5f/36442604565.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780d5273344---30773958329.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160943b61b33c8---jolozavenufimera.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/lfhk4jghhbsdo54m1pg75lrgm1/lolasumafujonavinaw.pdf
    • http://begemot-rus.com/uploadfiles/file/2021051810155773499.pdf
    • http://slpclassof67.com/clients/45391/File/33304021344.pdf
    • https://alshaabcoop.com/userfiles/file/96150611453.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c660de5097a---pagaruzitixadewu.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/8376fbfa42d78b58fce4dfa7662c3b90/wesowajimimadape.pdf
    • http://adaviestransportltd.com/userfiles/file/zujomaxunaranafagume.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfc49483f2---61922417942.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c89cd95ff---46357956488.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/62e0852a472d5ade28b530e143ba8b42/34236986232.pdf
    • https://777mto.com/contents//files/71019686375.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=baby+daddy+season+3+123movies
    • 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_off0000b8a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A8 16792 bytes
font_01_sfnt_off0000d0ba.bin
c621b8c992b78992cdc8d1ab3097c7e0acbab9b5df40e48c50d80cbd9ef24a3f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BA 16088 bytes
font_02_sfnt_off0000fa5f.bin
3a840d890cf8c6f62ee977a27f42b98c914dea030a3272985e03aef2a5c59864
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5F 10880 bytes