Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fc65fef80f95f3…

MALICIOUS

PDF

68.6 KB Created: 2021-09-11 01:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: b79e6b4d6e778af9c27d26667cdb62a7 SHA-1: 1ecba03efdec5f4937df66d0526ac89bdbb38f5d SHA-256: a4fc65fef80f95f3c13d14e55d76c5af75f35fe0f04f20a790339561d3960636
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://careersourceokaloosawalton.com/files/public/52507990048.pdf In PDF document text
    • https://onlinendttraining.net/files/56037671822.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210903051135.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/gabanolelum.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/75484498093.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/11128804018.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210907060123_h68v31.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/93516194150.pdfIn PDF document text
    • https://suavitinhtannha.net/upload/files/tupibovakokogudijunisedi.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/falaji.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/81128682089.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/kibog.pdfIn PDF document text
    • http://builderall.info/userfiles/file/14016920470.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab99262e6b---19499629628.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/20063464296.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/mefezevapaxogetazo.pdfIn PDF document text
    • http://lobi.md/userfiles/file/danapi.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/89577456468.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/7792760715.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/1274886308.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/30860368168.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/71750324158.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109020555509364.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/62005171797.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/suzesanapisuruwipimij.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/13181153889.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/zenis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=add+apps+to+work+profilePDF 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 extracted file (font_00_sfnt_off0000b178.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b178.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB178 10548 bytes
SHA-256: 6ea1dfe77b553798662e83c24089f60579c203a6f1ef0ea7607766d8668d0e99
font_01_sfnt_off0000c9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B7 14076 bytes
SHA-256: 5c78abf7eeff9731a4c1fbdebb0d823cd8f880551a051d4b25e9617d109a1ce7
font_02_sfnt_off0000eccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1