Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f8377e79be4bf9…

MALICIOUS

PDF

72.0 KB Created: 2021-12-11 13:04:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 7f96408c63f481057a55f28d01e8075e SHA-1: f547bf13f248acb5377184d1627ee37cda87504d SHA-256: a4f8377e79be4bf98a776cde97355af5e27600ad5e4d381c9fbdc9ab099c2f88
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://odontologosmalca.com/images/userfiles/file/xixitele.pdf In PDF document text
    • https://highlander-inn.com/assets/userfiles/files/81221282465.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/39670342496.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/52417054255.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/mopijetuxovilo.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/5272476525.pdfIn PDF document text
    • http://firsttimehomebuyerstudy.com/images/file/gelemamobabi.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/26967577580.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/wevezotodujilema.pdfIn PDF document text
    • http://westfield.qa/multimedia/userfiles/file/pajokudip.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///60307282978.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/ferujebudofivabis.pdfIn PDF document text
    • http://ranchobg.com/img/file/25400597901.pdfIn PDF document text
    • http://dgjst.com/upfile/file/96967283367.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///27280731335.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/webavitaxurofi.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161429c95b141a---xinujajafogesaperigenen.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161533d55b2254---28066160912.pdfIn PDF document text
    • http://chinazzjx.com/d/files/18226310756.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161a8f84540839---xemetabos.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16189b1ad71e3a---rapepo.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/26250820353.pdfIn PDF document text
    • http://tlw.ro/UserFiles/file/92586588705.pdfIn PDF document text
    • http://e-menu.hu/editor_up/sipemilakirimokofapalofep.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416d6c09d02---86680681716.pdfIn PDF document text
    • http://bingsu.ir/cache/fck_files/file/27084321019.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/TxADE9PCSUw/uplcv?utm_term=mafia+2+crackwatchPDF 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_off0000b572.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b572.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB572 18000 bytes
SHA-256: c715829148ea56f7612e166703328a44f51e13a016b07d8b3b9848f0fc764ac1
font_01_sfnt_off0000e4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D7 10152 bytes
SHA-256: f7561bb5684c9a57c0ec4708fc99ed001995a0d6be9c3d762d5aa7f7b40d703f
font_02_sfnt_off0000fbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD2 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336