Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3644a5b2082ae5…

MALICIOUS

PDF

86.2 KB Created: 2021-07-02 19:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: 3ef3aff884997fea611b523b6928526d SHA-1: 36dba47623921040ca5f79eff97509931e86e64d SHA-256: 4e3644a5b2082ae5d3d940457f003e0668588584cdae9c11aae2ee1e9a65f2b9
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://nomylo.ru/uplcv?utm_term=all+tenses+table PDF link annotation
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081bcf2d320a---migubumevuku.pdfIn PDF document text
    • http://artospace.com/pics/file/38550861178.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/diboxijojafokuliluvide.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1623149664.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/0ebfd960cf43d3cf2e153d81608b4f3e/78819081211.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/6f9fio1pf9ojgq70oqr5ob0n62/sadizabotanot.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/jlks9q98693b5k6q6evuq1p6b6/nikuforetenepurinikalos.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/varawokesaverojibixexerak.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/d5677cb555bf2e326a119d72492d375b/kapitojadoloxizapib.pdfIn PDF document text
    • http://medrea.ru/upload/files/46433341171.pdfIn PDF document text
    • http://mega.kz/media/upload/files/kaxumipuwedipexoselivedeg.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/39585166861.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f81448833---vipagakinimeveb.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/usge14pq7c1vcq57288fjj5efj/78062879296.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3dae3f60a---99011797473.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/itdhu6dk0hndej53ghp1j3d61h/buximopudokufajatenevig.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607be8aac5a36---fiwajuv.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/f9b07528fa9d904f5fb3b3737eab5ef3/86276226220.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16098888d7196e---porakawimumadovikarawota.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/89c63a9dcb8110044b9eb3df171d642b/kasisodudalexase.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c0dd3f92---xogerum.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/c230b81b44738c273bb568d7c08be273/79773078890.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/drjr3n4s6bqvc2fr22kbqbmbi5/jewutizatebewulujop.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae468166b---bazol.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/65aa26e154035e51ee9db297e3b68e54/vudotadifubo.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/padutosimapebonob.pdfIn PDF document text
    • http://sns.hu/_user/file/89251037697.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_off0000ef10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF10 9912 bytes
SHA-256: 66a37cefcb4ecbdfc711d5cb468045e1dd8322d2d951950f836e2f830eb94434
font_01_sfnt_off00010524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10524 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D36 17420 bytes
SHA-256: 716d9b1d5b4c2926d32cb2041b61069745885ff11ab533bf0db9ed5deb51175f