Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3bbcaffdfc7464…

MALICIOUS

PDF

75.1 KB Created: 2021-06-25 15:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 92103140ef58d37208f971605eb3cb63 SHA-1: 1958a142d15e6a6dfa638b9134d39323eda79a9d SHA-256: cb3bbcaffdfc746443a49201251b14464186c06ab39bd2029b72d622cc1b0809
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware-distributing sites. The file's structure and link farm nature suggest it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a546b02e8cf---56702367176.pdf In PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/231fed8c6b3c78d97c132aed629b11ba/sodefifiti.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ggr4jcssrd6asgc9cnh3t3mah1/wokaram.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/83667377045.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/su0vpbvftehesmb1sqako5u86u/31038033626.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/xunaw.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/qj81pooojutbpvhu1gi09m4bv7/kezoruzunajogejinuwolatu.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/9626ffdd57a2b16dcfef30bef2abaa0e/kurulozabogofifijoso.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/rudagojekoxep.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b52370ca04d---27731542972.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210608_F57241E0D1F2F874.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/20741779505.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/5oa9m7qrtt8ts6r9493hcf1nf3/regibewozuwizu.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/941b3176dc02e9635b00ff5724f108fc/28860254661.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c50346b03---42859004096.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f093ac916---defufumejijolesew.pdfIn PDF document text
    • https://dolcezzecaffe.it/file/wewimalalujilarujilof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=kannil+anbai+solvale+song+mp4+downloadPDF 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_off0000c221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC221 16960 bytes
SHA-256: c055de29030ae460c4653cb1b6436adb67ffdb2337f55d8129dd8e41b57f7666
font_01_sfnt_off0000ee65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 10900 bytes
SHA-256: 5005b6ef842f4a943baccb8056a90eb63937fb5181cf921de52fe780b9a5a594
font_02_sfnt_off0001073f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1