Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf0d59511727e9a…

MALICIOUS

PDF

63.6 KB Created: 2021-09-02 07:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 823c539d46f5f693bb7069db53084995 SHA-1: 369b6832f0042a22c017e0c9922206bc0c651f5a SHA-256: 9cf0d59511727e9a76012d04dc294569b35a4756976d26473f12fa6398c13d74
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites used for hosting malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6860

Heuristics 5

  • 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
  • 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://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/a45kdcn3f18n4s6h35q9q0s3nf/resamaravonela.pdf In PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607011062ae63---wawutipamuwajabuk.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/ruripo.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26695391918.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/4051f55224b27b927c646912194c7dc8/liguvopofobetarubabitut.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/5475bcc50c40aea7e088df34386889ff/jupamoj.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/jimepap.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/56439177876.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/97540096313.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/5c3fac4deaa6ca84b9fa9e2e20186b0b/fagufojuve.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/07ch9j5beb44upenv7s034f0v7/24673115079.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1269250bac---xopigi.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755a3ba5b01---dimaxojaxofexikojole.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609231900914c---61955670339.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/dibefufevejiw.pdfIn PDF document text
    • https://olterus.com/contents//files/piwakevez.pdfIn PDF document text
    • https://southafricapools.com/contents//files/81718600457.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/93421695781.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a09d693fa51---xekeg.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/c3202cc63a759cfd14302022802340a5/kigasulowasomeg.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/risotuseserepipegu.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/e072ce94910d0df73ae2216e6e326084/6509043372.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/55537769478.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/78716139604.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a827423fa6b---wezomevatodilapajumezol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=gyros+nutrition+factsPDF link annotation
    • https://tes-sys.com/uploads/ckfinder/files/20210727/16273173819255.pdfIn PDF document text
    • 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_off0000c536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC536 10404 bytes
SHA-256: 16f12b7890690b0d2adf38603126f2f946455f160c6a40991491907cfaa599b4
font_01_sfnt_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 15860 bytes
SHA-256: b2fb15258d0fe0a9440bd7a5930c93db2c9f68f357f8d635e2b20a488560bb66