Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d5d7fdef8130ee…

MALICIOUS

PDF

114.0 KB Created: 2021-07-18 15:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 20b99134780c1b607de328bef80ea466 SHA-1: afe07acb339b31f143da7d5a4730cf8f6dba8760 SHA-256: 99d5d7fdef8130ee7a142b375a6fc9848ab2e61951b638fd45783bd276f1125c
156 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9859

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 http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16070cd59da25a---16843471800.pdf In PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddf4882caa---11283438799.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/pb3ijj4skcsunl8e4aoo9rojc7/35686992100.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wivekero.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/soraw.pdfIn PDF document text
    • http://novichiha.ru/pic/file/47731548595.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085d45665136---vulivusitu.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/ebd1db50c2ce8cdb6cc04cd32aa99a60/vawazufizefi.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8723e0173---vibuwisafirufez.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/demr6q8cv8bka68naqqelasrjq/mawanatigumalokuwefel.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/mivudunidiburolukederu.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8ef412cf8---75974607946.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/bimak.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/tupojex.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/b1fc899aee433db7fdd4ce2d486a2ec6/lipidimelozik.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/78177044520.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/c6eca0617211e2c96a6c0503f94afb04/wojimuzofesunapemagolosa.pdfIn PDF document text
    • http://jarosi.hu/files/file/kewewewetawuwabid.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/8480318318.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/43829392772.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/dejjls2bi6vfp4b6cqg9egc6m6/7037446631.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/bisisujeg.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb15eb2691---zevibapuxovozowovi.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/62588138710.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/62826017783.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070fbd01238b---manafamenubix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=aerobic+energy+system+activitiesPDF 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_off00015941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15941 18568 bytes
SHA-256: 7fa6a132fdebc460a324e53681b48441399bfe5d4230310cc275c15ab2d5df00
font_01_sfnt_off0001897e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1897E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A195 10828 bytes
SHA-256: f0fe0ddb211617c3b1768662e5bcf68757e64a38018acff8d554c9220c95359d