Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f61b006b1c458d…

MALICIOUS

PDF

77.6 KB Created: 2021-07-16 16:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 52a6cd7d8483d4119fdbcf165f8db6a7 SHA-1: fffdd177ae3bdd1efb6213176036d759c40e0650 SHA-256: 64f61b006b1c458d2d1a56b5b535b6794716c480eb9a90848fcc48476fca6511
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links, many of which point to compromised WordPress sites utilizing form upload plugins. This behavior is indicative of a link farm designed to redirect users to malicious content, likely phishing pages or malware downloads. ClamAV also detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3127

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5a11ae0ecf---jiluxikemoledimuwitafa.pdf In PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/de9623e0920d6268e66e2ee221af48be/wazifuwuve.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/lerexesubiwu.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/5838759712.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/22cd89f18195161d7038a47c9ce385ac/75414004494.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/3nslchvvlov163r8rl3ubgatr7/7010797125.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/xaxobadijifezu.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/e7d67198c6fa2b8c9caf795ad46db607/33301382583.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/17352723280.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/51985668387.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074dafec2720---bogesafilo.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091c05399823---41267545927.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b8517a88b---rufoje.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a15b63c35---nudakidisamofuzo.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/c2a92c79b77c788af0d47c54d6d48788/xefepepolusewa.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/9d236cc3438228020a7c025afc96914a/soputujuxevifazaze.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9d66014f3---19417153010.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/zuvogozufitapexexapiwira.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a0226293e---69124032444.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869bd359df5---60204974921.pdfIn PDF document text
    • https://aashianarealty.com/file/fusixilaxenetedopomoxod.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/667bfc1b032a9c1f2ff229e51f8ed58d/66485008000.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/zofajadu.pdfIn PDF document text
    • http://lhs1965.com/clients/880801/File/26217627429.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e088f0ba30---18933967776.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/59603193443.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=7g+to+ozPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C3 9492 bytes
SHA-256: 29233704d64e0ec2e6d0f10070c38ece10d47a50b0df2cf27237874c67a3f625