Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0b7afdb456aa19…

MALICIOUS

PDF

103.3 KB Created: 2021-06-26 15:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6bfd5697d59a47fd8d564fa41dc29cd4 SHA-1: a98650b84d1da20c5fa1b9af35f4d7e5b47da23d SHA-256: 9c0b7afdb456aa194b8940598a9461f931927d5e722b1c3b07ceabfad2fe00e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress upload directories. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's structure and embedded URLs suggest it is designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://sayurhijau.com/contents//files/76005423288.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c26f1dc73d---vadovu.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8e0b00b96---31640101533.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb6b2a285b---60061883758.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ace3afa4943---gulolabakuwinuvuwetoru.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160afe4550f4c3---daxugikubafafibimizowa.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/23717752401.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c56b8b69580---67613472737.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4c0cc3721---zoxexiverexikejuxilubavo.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/65223881199.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/37092401586.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wapuruwivesuzeso.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/litukimazisupujopivezoxoz.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/5465318d23b9700b0926936056565ff1/18979139073.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c86676881---66955792889.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/lagoreguzuzinivamegava.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a30ba7607be---tudisur.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dbf2aed99---4569603679.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785d3d7642b---jijexesureboge.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/iv42dd4pdklr1t9lj42jksa88u/pipesudirakepafizasim.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607908e23515e---dofenegixopudapepo.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/74754094753.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf9e0b0569---movedox.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca1a4b1406---luzomuw.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/5h9u7de3j9jvrvkoo4s77genl3/fezezolapovifovuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=one+sustainable+way+to+reduce+desertification+is+toPDF 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 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_off00013188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13188 17144 bytes
SHA-256: b96ae7af53c69eee79ea3d41e62212e126fe303304ccfed036e3d62564653e4e
font_01_sfnt_off00015deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DEB 10932 bytes
SHA-256: 0283f320477b9df3108b027397a2f6a9a54973c2669213bea963459ccfb01464
font_02_sfnt_off00017785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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