Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95306541776e876…

MALICIOUS

PDF

85.9 KB Created: 2021-09-01 03:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 07670a649be6c54705ec0e47dc07e841 SHA-1: 0f1abb890a8384564dd870a4d745dea3ce47aa3e SHA-256: f95306541776e876ccb701919013f90ca585842ea55f686013379e70f0df6ee1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for a phishing trojan. It contains a link farm pointing to numerous domains, including a URL with a 'money converter' term, suggesting a phishing or scam lure. The presence of multiple compromised CMS upload links further indicates malicious intent to host and distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://nomylo.ru/uplcv?utm_term=money+converter+real+to+dollar PDF link annotation
    • http://inbeeldt.nl/userfiles/file/xuzizibiborut.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/lafofojotebime.pdfIn PDF document text
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/74911247117.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/90163765140.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0598036001623590811.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16084e0606982e---1573839822.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/5f2c10752ae55c8b26b9900252c1754d/matuvitegof.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/44206542191.pdfIn PDF document text
    • https://iword.de/userfiles/file/wazagimubujepefiwu.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160e929fa9c6f8---26325455496.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/2go4i2lnsnsmij7bmb1kl8hkn6/zebatomajilubituzutudigix.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/62100905754.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/46219684695.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/zozidisebaxuwoz.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b6b362328---67117200991.pdfIn PDF document text
    • http://cjatkinson.com/userimages/zusaviwolixolomaxo.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a107292093feeafc7eba9be1a8a8fef6/zojinupurorujijoloripu.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/73447576722.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/maxorolunus.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161002482c45e5---23473178149.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///zugozodizajujud.pdfIn PDF document text
    • http://ruiqingchem.com/upload/files/bamigovevabijudanisato.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/97874070935.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/devikonewajaxepu.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f4560d47f91f0344503a78f16268e59/ritogapadagizefun.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_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 10276 bytes
SHA-256: 7c12ae2311a95cd737e02786ccb71b0431c6cf6d5de16283a14364fe4757c579
font_01_sfnt_off00010309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1B 17572 bytes
SHA-256: 52a20ea0a17cb50fc0ea02ee677676613a858f837d94f38bf7266a89d00c6189