Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99e80d01d386bc9…

MALICIOUS

PDF

76.3 KB Created: 2021-08-18 12:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 775d901f98a34a6ab3b217e458505d1b SHA-1: 6838d2bca330788e18eb309492f1a8e9569e269d SHA-256: f99e80d01d386bc902fe6c197628c0d3d2394f04e4b2d46c083ad985a1de23c3
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://huntic.ru/uplcv?utm_term=livro+de+f%C3%ADsica+ensino+m%C3%A9dio+volume+1+pdf PDF link annotation
    • https://vrindaindia.com/php/joseph/uploads/file/mugexis.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/77809916037.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/6691104986.pdfIn PDF document text
    • http://biosystech.com/pdsFck/file/tatidusomuveguf.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/gadudixugoge.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021081800572753.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/70779391903.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/sadinezuvudulow.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/9354108581.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/6439526017.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/juguduvusewufoleliragadi.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/fetuvuxaretaluxa.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/2963503586.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/93015665270.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/5893udup87repc3nls34lk9mig/23842061436.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/39876706100.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/65725863800.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/47175506766.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/42a70fdacd6e4f317995e20cdad1808e/58921127946.pdfIn PDF document text
    • https://petikdaun.com/contents//files/12276850176.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/93839872107.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/12d182adc6a8b6cb5512b4941e0ba685/78201520458.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///nupukuzumedapesalodozubat.pdfIn PDF document text
    • https://emmaushuis.org/pages/zageretufegomuxuzez.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/kujekurovamepolawekog.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/74026908495.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/13407720214.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_off0000c36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC36E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB80 17940 bytes
SHA-256: b1e35164ed11e0470f16313d1689b5c66590d7883b3f5449d8767a145b8e805c
font_02_sfnt_off00010689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10689 11072 bytes
SHA-256: 0dd69a06edb690a97864ed2e067ddc9c399b7dffacb8dba6cdb0a0ba79ddb242