Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f3e0c3549c0c01…

MALICIOUS

PDF

71.6 KB Created: 2021-10-03 00:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: e5ba19022ac0bbf4896414b562bf4faa SHA-1: 15c1523b9cc81e4130501f46c59c7d77833293d3 SHA-256: a4f3e0c3549c0c0172f61f103bea81c258cc44ae5f1fa9bdf37771d4f9b4dd96
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=call+of+duty+black+ops+3+utorrent In PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/jafekijefaraleli.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/50994428623.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/mawolawurovomaxufovegupib.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/dabavesudogawovuxokijigam.pdfIn PDF document text
    • http://ppp220.com/Upload/file/samozakumaweritumeruk.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/pazabugefizumokemozifedu.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/niwulesuviravorenobaliwa.pdfIn PDF document text
    • https://minjar.mebel18.com/uploads/files/63711396423.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/26712516564.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/nobizabawulokenosine.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/manoriwokes.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148f45d19b72---gapabapebarepe.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/wawuwugezogibewojami.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/50790196838.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/menelabodakoxo.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/jogogukixujixiwunujunogu.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/62365611881.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa05ea6710---53367636418.pdfIn PDF document text
    • https://winstar-tools.com/UserFiles/editor/file/32779938726.pdfIn PDF document text
    • https://truongdongkinh.phapluatvietnam.com/upload/ckupload/files/rupokiripupojazakabig.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16141b3577ed48---20595836523.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/tufoketaxafifet.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/32030279934.pdfIn PDF document text
    • https://activepymes.com/pub/file/zifugipomezadixufepija.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 extracted file (font_00_sfnt_off0000b408.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b408.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB408 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1F 11172 bytes
SHA-256: f5daa6be722be99cc84402b4c12716fad565a4f5070986ab1c7621d0004f6e47
font_02_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 16544 bytes
SHA-256: 1bed4f583f8cc778dc6f9997b2caa8703f4ae4eab0b46fdaafeb3f456aeb5d69