Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9f705cb734fc61…

MALICIOUS

PDF

91.3 KB Created: 2021-07-07 21:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 34065aa5bcc7223a81c2c98acebf4bbb SHA-1: 80044a890d5a724ff0634fc8fc13372871142122 SHA-256: fd9f705cb734fc616480b2b855132f08d1f43e696716e382abb58cc83eadb1e4
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a link farm pointing to multiple compromised or disposable hosting domains, designed to redirect users to further malicious content. The document body is heavily obfuscated and does not provide direct clues to its intent, but the presence of numerous external links strongly suggests a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://rivaflo-south.in/userfiles/files/zawajifaxadiziteg.pdf In PDF document text
    • https://mayphotocopydogia.com/upload/files/59925322225.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/60898407794.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/39016221118.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/h04fr33e2f8op6o01gmbd09m03/27586887157.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aaeb21662---wivonaboneg.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/84886472329.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd554080e45---dobomebaburumuzituruxoji.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/6pudg4v53ea6bgieic622tiokl/93919694296.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/totelasivoniwetopi.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/f8b437a109c23df0398fcdcbbbae262f/8786378728.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094e072bd34c---gekapotatiwo.pdfIn PDF document text
    • http://www.asslar.de/downloads/42568084272.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16080ebfcb6df5---xetanidegagekalutimit.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607746e02bc45---3140647029.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/xaziwoxilonudob.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aae723b669---majasek.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/weweratofujegasojaraf.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/30703579618.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098b2cdb6d81---guraraboxixurisid.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160770dd8c694d---bowuzizexobuxeze.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/16qfbfm5l77qd7mlp0q9m4cdsl/37543908930.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/8nskat0nccb5gv93250tsutt05/babokivoborabu.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/f4ef7c534bb9eb2e06fc373063620b59/nemanaxebelejuv.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607364945fd6c---zeparasaxugebaretiguje.pdfIn PDF document text
    • http://axwelindia.com/uploads/77277092690.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084a1bf6a6cb---webidabafoloxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=3+positive+effects+of+volcanic+eruptionsPDF 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_off000100e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000118f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F2 17664 bytes
SHA-256: 31fe0f03bd1b008058fbd5cb4ac4cf5cf8d61aa8969e3909afc853f79347e203
font_02_sfnt_off000146b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B9 10712 bytes
SHA-256: 9c8e4a60ee5e770ec9be28dcbb0058af34a8e5a32fdc9054f61bdf67067674b7