Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8acd2c5114185f6…

MALICIOUS

PDF

113.8 KB Created: 2021-07-02 10:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b595cc2361de1d2a17bd212b7a8aecc9 SHA-1: a5942a60c2627bbbe331bf96bc9a49692b33538f SHA-256: d8acd2c5114185f6890bee00b47ca00ae4df880e97da08c4535e0ec7470b524b
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites, with numerous distinct hosts and links, suggesting a redirection mechanism. The embedded URLs, while some are marked benign, point to a pattern of hosting malicious content on potentially compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608030f237740---wiberomuzalel.pdf In PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/xewunegarifami.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/fidovexiwuzexasib.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/39942791656.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/c2f70a23691494c1cb3f7a475e330db2/famodinedikotomuvizukuv.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/g46jk2sqqilegpg3g03ko87buk/sazuriwubowimisawejadi.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/83f2a4c12564857e08d851513bc1d09e/2088122332.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/acfc25a9da4b17553d26669ca6756a98/bukofotitugoxof.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6d4d0d2fa807d401a293cf3f09263b39/45606170959.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/qm3foa70dkfgmgvb1t66htspi3/xumofato.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/rafozifewufemisiwopo.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c368b83c0e---56152525748.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7be81010---kidaleredimorubi.pdfIn PDF document text
    • http://islandpointfl.com/userimages/63297870086.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/13077c1b8d57f922bc34cb58aba986ea/givamupasifuxepusu.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/reriz.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/71221897972.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4920799783---gimexepezomud.pdfIn PDF document text
    • https://landi-bg.com/images/file/60747000176.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/39653414349.pdfIn PDF document text
    • http://attlas.center/userfiles/file/wetujigawamo.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac05d70d0ec---giweb.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/p3a3eguhddlh2l65u71qfurtp5/61666551008.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/1cdd16eff76431e6aa223205c37514ad/litotuvovateri.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/a6d72bc74590374dd2793dcf36c253bb/81432118473.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=best+time+to+view+jupiter+tonightPDF link annotation
    • 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_off00015a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17231 17900 bytes
SHA-256: 5a054894a1560d29e1474555066a6b9fcdf1a9c1b4fadd3071cabcdae09275d8
font_02_sfnt_off0001a0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0B0 10928 bytes
SHA-256: 8bc9623538540a95a3ee806516afe3a89a9759c6f48e76be27c11ee365758cf1

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