Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a11cdf32c8d29a9…

MALICIOUS

PDF

77.2 KB Created: 2021-11-27 07:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: 36560117c08f29a4111511befbe9039c SHA-1: 81deff91daeb50afc3788bc099d13a3f0c3aa815 SHA-256: 5a11cdf32c8d29a91f52d577d8b5383e954c7cfd6ae1880dd0b1d394a2358542
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://medvor.ru/uplcv?utm_term=flregkey+free+download PDF link annotation
    • https://aykutemlak.com/upload/ckfinder/files/nanuvupovosuleb.pdfIn PDF document text
    • https://edusfera.pl/upload/file/91914495629.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/77982920370.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/74732310375.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/tizogimepepofupat.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/2452864453.pdfIn PDF document text
    • http://kdbelektrotechniek.nl/uploads/file/mejimapiw.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1616db27aafe27---kuzedusolaxavipagexu.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/55737769309.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d7a048a41d---86013774516.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/63539357799.pdfIn PDF document text
    • http://st03.it/userfiles/files/89892320129.pdfIn PDF document text
    • http://chinalabware.es/d/files/gowagirujalafilasoloto.pdfIn PDF document text
    • http://jiachuankeji.com/upload_fck/file/2021-10-18/20211018135820906685.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/75541341424.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/puxunuwemerawawisiru.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/sinudubozolojofutovazaj.pdfIn PDF document text
    • https://mkart.it/uploads/file/desiditajodefape.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16140e9075aaf6---39343637282.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/fevotamafudirofinezul.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/vuxakeroxotolewiwamol.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1618fc5402232d---dimitipuben.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_off0000c76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76F 19028 bytes
SHA-256: 71f2707df2a25d6bfa5760cce70df369b88ac5c32c76ce61b8292f223224fc48
font_01_sfnt_off0000f93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93C 10440 bytes
SHA-256: 4c9c31b01d4a0fb2121d3ba1254af57f90e147793cc6da2b9aef9b68a54b2852
font_02_sfnt_off000110dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DD 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336