Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc04e4e93e9d56c…

MALICIOUS

PDF

78.7 KB Created: 2021-09-21 22:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: de396ab31296ed240ba44abcf62066ff SHA-1: 3b3b1bd29718d06fc83bd59d8666ba0f49ec2533 SHA-256: cdc04e4e93e9d56c91e45a0384b4711cd1905756da60a2e17cbcac8ed49808bd
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating it is designed to redirect users to potentially malicious websites. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://allytemp.ru/uplcv?utm_term=live+wallpaper+league+of+legends PDF link annotation
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614095d929e22---42409543405.pdfIn PDF document text
    • http://yhbinternational.com/userfiles/file/38646638037.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/66319747660.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/dominuvegixadetapi.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/laralukiwexunasoxiv.pdfIn PDF document text
    • https://v-rshine.com/upload/images/files/dewined.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/dd8223c28de8f58d69957b3b849caf45/47897332163.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/38673268834.pdfIn PDF document text
    • http://tzsunup.com/upload/dukapulekegadalu.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/politarewapazamijaboxon.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5169972f547f251172d2e63e4dc9699c/nezepuvotipufojed.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///55397046378.pdfIn PDF document text
    • https://labelmarket.pl/data/file/83447998110.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/fagir.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/gudoxalijitikabozusaraje.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/faralixilima.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/rijakaligu.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/dd040ca5f27056ed6cdb966e1a7a02a3/68724268898.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/bijuzekafedoduxo.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/xikemelotisotej.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/39954758291.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a68b992dbc---668062241.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/mibasimubewikakoxewevos.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/zajojatu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB5 10784 bytes
SHA-256: 43ba333792a9fb156744761e1d2b2d43dce4223bb4fcec261e898884f5b83e87
font_01_sfnt_off0000e47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47D 18512 bytes
SHA-256: 39802a502651a681dc13f59eeeda40cf7e784068053cddb7de3c0f87659cda30
font_02_sfnt_off000114e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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