Malicious PDF — malware analysis report

Static analysis result for SHA-256 9639a8f4d5179d9a…

MALICIOUS

PDF

88.8 KB Created: 2021-07-04 04:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a813e453d0a2b3e8f782b72df5be6cea SHA-1: a54423973332d8a4b6d72e0c47c2aa701d469d84 SHA-256: 9639a8f4d5179d9ac74a0b7ffde6b9413a53a937285ddcb250604f009966855e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/mer2ku62krpocluhfqk6psh984/kegoregulesozimet.pdf In PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fec78dbf46---76305871222.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860a95946a4---7202543901.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/zetidiwabibabodo.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/a64a02b25ce44d02d03709358a1d77a1/tutopipuladarolurowutokul.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a6328a330---gujasole.pdfIn PDF document text
    • http://tochalco.com/uploads/files/fulajivol.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/xuzosopurawirodo.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607294d453409---87047698486.pdfIn PDF document text
    • https://guijek.com/userfiles/file/kuramowisufavimudajor.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f12c54c30.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c94fcc66200---fifikefepufupifafegaz.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee009b8bbf---72815959951.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/30174527393.pdfIn PDF document text
    • http://www.toptehnik.si/images/34815896305.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/galelixasabebina.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/wokizetelozubefexo.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/qai2j3ld77mbmug3sbqbs28la4/kizisodidofo.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/25151057884.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/326981f3e72cf7ea06f3d71dbe2b1b7f/potilugo.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/50965522619.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0do078a73gf784v8r4ufgldm92/4696448013.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/29897509507.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=reading+counts+answers+for+harry+potterPDF 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_off0000f7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDA 11200 bytes
SHA-256: 9df5ace4908b9a279849ad43a26b3d6232cec3cddea4b554ef51f99a942ebafc
font_02_sfnt_off000129e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E0 17008 bytes
SHA-256: 5efc21e437dc414c43d74ba541392e19e9b41be9927cd57ccbe6a6a9440c323c

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