Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4689ed6e816a64a…

MALICIOUS

PDF

107.1 KB Created: 2021-07-21 04:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c4154182ab6bcecc24a43be2c464e5d6 SHA-1: 826f77e75f1bc513b21991618debf5faf3dd8c19 SHA-256: d4689ed6e816a64a30c179b5654fd6af70a8130525747126261bc55f8757bfbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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 https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e0ea2ede1---71342624598.pdf In PDF document text
    • https://armagedonspedycja.pl/files/file/buxutadawonikofavegoxe.pdfIn PDF document text
    • https://ksuskalology.com/images/file/58368861886.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/16ii2h32sa82aggsp42ftf9p87/sitamezeguki.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160804df4885cb---7726095791.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/3771297bd046bce858d7b04acb7a6693/47246919817.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/zovagividivepal.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ps87l0uh40kbka8ie4425ocs60/toleg.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/5242269059.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9cc650680---kojonebuzagedisawidam.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/labita.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc08128cfa4---44694159445.pdfIn PDF document text
    • https://bursac.net/userfiles/file/88306383204.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090e2352acab---morozuluzabi.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/e4g7judshuacs2pacl646es3p1/33707157455.pdfIn PDF document text
    • https://ancoraeducacion.com/images/gaxukikerejaxudebotuvipal.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/25709031858.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-13/20210613041658368229.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070b4efa3f2e---85322913231.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/2e69ead5bf0b2913c2d9aedd8a590174/tilupomoxuzebelig.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210706040227.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/9vcusg96ng8uqltqq3dn0ddr8l/10738261575.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081db1e19d58---xazilamali.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/39289564526.pdfIn PDF document text
    • http://bakoca.hu/files/file/vovumudewatikepegam.pdfIn PDF document text
    • http://haus-st-otmar.ch/userfiles/files/zevizubefijudopixerupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=hotel+feasibility+study+examplePDF 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_off00013f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F34 17692 bytes
SHA-256: facea2bff427cad3f0d0192aab21148d1d4715250f3beda449505f48cc975085
font_01_sfnt_off00016da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DA2 10904 bytes
SHA-256: ca315ed23f264d4ac10eeb8032eeb0771d6cf2dcf607e88e8949fb6df06ddfda
font_02_sfnt_off000186ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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