Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9028245fac7acf9…

MALICIOUS

PDF

85.2 KB Created: 2021-07-05 17:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d2ec65caa07537228b77ebb11bbea108 SHA-1: 1a6433ff5c0eeafa60c88e07c5ad43bc9addb0a1 SHA-256: e9028245fac7acf9a9dfa9de47e765aeda2f02c652efe518668b1174a6f0be56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of external links, many of which point to compromised WordPress sites used for hosting PDF files. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution via these links. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, providing no direct user-facing content but serving as a container for the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cba9d1cd16b---lexajurodulejuzazusiruv.pdf In PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/karotekiwilozawubog.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/2oiehbv03517a1ni04ibcmvk1j/kowomelise.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/xivuva.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16083dca06c676---pegaxejid.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/f44cd778762d90f2b9758f7a65cd569d/78594333273.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/89524243789.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/mojupametuvaxu.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/tqqjnla38apileeqs22436p8sv/kemasoxumarivobega.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/legekebitobajisipurixej.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/vegarufuregunapisozo.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/4qk30si58h2gnjvdq5dtafgbir/40404509697.pdfIn PDF document text
    • http://intergeored.com/upload/File/55537024256.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/67067534658.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f2bf4007f---jegilisatapuvijume.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/nabekelaxegukarima.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/14619314433.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/7569f674f229547afc9c49c5cbd902e8/lipijemanakigegugu.pdfIn PDF document text
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/7927796102.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608533e437d2a---pofesawovufowalikude.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/85371784774.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/vusedefigal.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/75f9871f0cb1aebf60c385a3bcf19df2/38838314311.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/kotikopenudozitigoz.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/2cf40a18a1ea6daba6de57cf90e942c5/jalabirijixefifagi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=php+one+page+websitePDF 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_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 16476 bytes
SHA-256: 68bd6f08a6bd7fcd12b2a1ff0dd90a0025c0ce7570c12c156bc19b54fb4954b0
font_01_sfnt_off00011739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11739 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F50 10612 bytes
SHA-256: f266405481a6c6831ddb597e30a3fd45fb1d4eaa5c4b7053839820f05942cde4