Malicious PDF — malware analysis report

Static analysis result for SHA-256 486ff83476ab5c39…

MALICIOUS

PDF

83.7 KB Created: 2021-07-08 14:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: debaf0aad74ebb7c07ba02b11e37c9f6 SHA-1: e0ac81cffd93be9515f563b9b526464f607ca7a8 SHA-256: 486ff83476ab5c397371c7afc52d0e44b27b146de41eba98f116e6eb323ceb2a
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits vulnerabilities or contains malicious content. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to phishing pages or download further malware. The presence of multiple compromised CMS upload links reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://leavingcare3plus.ch/userfiles/files/60465778473.pdf In PDF document text
    • http://thaide.org/userfiles/file/sepezeb.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160948a1f15c8a---pipopet.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/e9a2b394dcc723b45ee936993c991c8a/zufetug.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/c452d4aa0bac10248e81111cd0f3c3eb/fawim.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606e923cebac6---rodunuxapulaxizemidebelek.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021052120480939.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f00a3aeb1---givikuz.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/df831466a730dcd0c850d2f350464c94/53730700578.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/36007350790.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/69358885220.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/6c121fcdd69597d2877125eb75c084b7/nezob.pdfIn PDF document text
    • https://lymfologi.se/anvandarbilder/221/files/11514384390.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5a1a4e42de511bb52a86601b44db53ac/45600800633.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202106/file/50785627822.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073c3a84bf58---56177366974.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/f0d6c2195185ae05669bcf6736db3919/tulepisizi.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/pesumowixoweraluxazev.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef321337d3---40075364177.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/pomagumakeso.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/xomusemolipuwenarodalif.pdfIn PDF document text
    • http://www.heksan.com.pl/file/lunubaran.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=fungal+infection+groinPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808c62ce71a---lofiti.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_off0000e659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 16768 bytes
SHA-256: d28cbdf0ef3c3561db4bfeb25812490e0e56ff944ef7fb0e58116619a582f7cf
font_01_sfnt_off000111f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F0 10420 bytes
SHA-256: d3f0b49aced641acd57ebdce3be9c3aeb822cc1b2155845902a007161467324d
font_02_sfnt_off000129aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1