Malicious PDF — malware analysis report

Static analysis result for SHA-256 308678d01d86cf27…

MALICIOUS

PDF

69.8 KB Created: 2021-08-12 17:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 32f03f771a1ea1c15a05652c07659efa SHA-1: 739deeeb1f934b101f783c4e454aa79ab2cf48f2 SHA-256: 308678d01d86cf275aa9bb394c58b49eba613f4da6e9b147b3ae84e24166ae6b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. The presence of multiple external URI heuristics and link farm indicators supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9032

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 https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abcc9792d4---33695602457.pdf In PDF document text
    • http://izdo.org/img/userfiles/files/nutorivatisopazakus.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/8adab0761e85145392a8c3f39b12b656/diderenebasovakawinogisi.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/92700856445.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/24253622407.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/41a42b9a4ec0a442bedf72f4b4cacabe/zekejevexitezoje.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/d0ff8e2bdde0cff8982b56407cbb477f/7236116821.pdfIn PDF document text
    • https://le27.fr/docs/file/wumoguzugirekef.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160929f3fab8d3---35448152619.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/34333837576.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ecd421fa7---resowafen.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/48295627833.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/88054207095.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/f53186f34306c4a1409526365d4704bd/zupuwawolajo.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/5800422849.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6aa3b8620d8f6c790af48330558fcd1a/2011526366.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/59633420516.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160750a5bd3943---6878450288.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c4935e46c---57691613448.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d2be53c6f2e---dopepuzovofija.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/29307767066.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160822eb907b9f---juzowitokibabalinis.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/39e97e4aab034bed7d4d1c421b1cbb25/91304935648.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=aromaterapia+aceites+esenciales+propiedades+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/80685090821.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABA 10760 bytes
SHA-256: 3be74591ea2f9867cca62f74af0695c81c63f72d4dee90b7b2acded2bab7dcb1