Malicious PDF — malware analysis report

Static analysis result for SHA-256 9379dd98aeca2461…

MALICIOUS

PDF

104.7 KB Created: 2021-07-04 14:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 78d4a5766d1e24cca1d187b69fc4d8e7 SHA-1: 9576243d7952681a9bbbe18cfc9c6c4b6ec444d2 SHA-256: 9379dd98aeca2461d6501d2efee03dc20484f1a23aeb20b5853be4aaab967838
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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://coretry.ru/uplcv?utm_term=adjective+sentences+for+class+3 PDF link annotation
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/516780b9518f5e931844de9354e2bfca/gilavawuxitikumodimuv.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/leredezokalexawatukimula.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/5451259185.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160768acd9735c---18674194768.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/sageposofuxixeva.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608200e2394f0---lulonuvi.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606f21cfcb0e4---zuturufepepulinodenebik.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/71fc672d1e73a97b2cba393f659699d9/purubivabesewafodotadu.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/66671201431.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/25c3c8b7d2d518dda223eb84aa64df2e/65713340090.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/bb5bbedd7e406df25a9b4b39bce57f59/84480283705.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ca8769608---wezinavebanotegipopodun.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/popexatuzozifapupu.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb4d1c2367---85676520720.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/51187428501.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/i9d0s4dhjpcic5jdrs0dfqkosj/nonapakewiduwimeta.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/33844720137.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/69718325730.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/3137660809.pdfIn PDF document text
    • https://puntoagricoltura.it/file/89842487821.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/2oa588uqibm3pq57hk4s65r8qb/tuxabofonaxebeturariluf.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/64937612302.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca13c34ebb---88133215422.pdfIn PDF document text
    • http://chamdure.com/DATA/files/21614888748.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/208696153fcb8b3750382b7925f4e6f8/kibitavikuruk.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F9 20672 bytes
SHA-256: 0c7d83bddb68d101fb6fcb795b1fb20d3a19696dd666faaaad78deee274fa588
font_01_sfnt_off00014c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C95 16188 bytes
SHA-256: 9d3a2c7f3cd7a845e425e22361150ca611a6b467aecbf2e15da520c4e09760d6
font_02_sfnt_off0001624a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1624A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A61 10820 bytes
SHA-256: 3c09b3787a7522dfb7010afd09ea9c3efc7681e023e0c8e9519ad697a575e5c7

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