Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef4793341d9555d…

MALICIOUS

PDF

75.4 KB Created: 2021-06-27 16:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08402f3e23b7ef7a085a0cc8597a42c4 SHA-1: 92ba700bef8c499f38cc457b90db98077c3c256d SHA-256: cef4793341d9555d6498d90be6e71ced7464bb13273667f545a27ad92b9f93be
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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.
  • 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://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080a29f8eaa2---52904168488.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/b85da15a0220a544027881aa92ad4037/46602110484.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f6f8053cf---nakipijawafob.pdf
    • http://jtour.vn/userfiles/file/nupovagerinigolenetilulaf.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/e1310155c473a5fadad78258aed197f4/32238116751.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752ab103825---xekemutusabozuvavidek.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/i3qlh8ua2fh7g3be7limi7etb2/xalujapok.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0fc79b61---84661233359.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922d993b197---28508404203.pdf
    • http://lmyc.net/clients/875386/File/wapunoseterus.pdf
    • http://etpatatietpatata.com/userfiles/files/48962739165.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609041479f611---29877220360.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3ccd19a38---91710306275.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608307ef57468---xozosaxisiwinebepo.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/60993c1f62ce79214d246d97d6674c92/fikeliberitugolexoxud.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b1f677398---76326298779.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/7ab02becb62f23f3427f795d2915e210/xadiraba.pdf
    • http://asesorgubernamental.com/images/file/14662679184.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a25f37bee---voxabepowibonado.pdf
    • http://hitecds.com/userfiles/file/meruzunufe.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c64ad1a331f---wigiwekajirenogazesizuvo.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/7919aa1588ddd2dfc522d2bfd28c4a03/38522125407.pdf
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/3685468231.pdf
    • http://brenno-tojestto.pl/userfiles/file/sikesesugutag.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1f182f260---46583180033.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/1aca3e20cdaed636588fb51ae46752d4/mukamefulitutiwupigi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+darkest+minds+tamil+dubbed+movie+download
    • 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_off0000c21e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC21E 16792 bytes
font_01_sfnt_off0000da35.bin
fecaf01e7c60a54d7ef2b823a325b0fe69b02bd7c43bdefe11a0d4f6a698753b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 10960 bytes
font_02_sfnt_off0000f375.bin
8bbff0a016abea39f0fd2095f1a649fd7519fc90ce9a5c5e9773764673b828fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 17180 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.