Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a01f811535d5827…

MALICIOUS

PDF

64.0 KB Created: 2021-07-27 21:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 61ee31e6c2e660a335e5920dcf8bcb6a SHA-1: c5cc3353363e9f1be3f3545fc707ae05b9a16a36 SHA-256: 2a01f811535d58274799b36211cf6f8d44386ff69602eed95838ef6ea87a301e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery through these links. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7899

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://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc0fb3cda4e---pasesu.pdf In PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca08c0fd17---2747021310.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/wugumudinotar.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/jomevibiwopewulolegopa.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf2842a4fe---liwiromazekitugatapinug.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/39e8f692f3bfeb974591e7cf1dd45f26/zosut.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a3d3dcc301cca241b19f1e694820be1f/pimixajiragabafosexeruxo.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/47308445741.pdfIn PDF document text
    • http://edgecs.net/documents/41572656967.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bf3b512a6---96372127809.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/5rggc7ibd778m20bsv67t0ugod/vejijufuweri.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b90437783f5---7562883832.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/50656350885.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/nubosodure.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/72016863503.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/ronamosafi.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/44503392456.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/rqqkkscbboihs2vem6n9trvnuo/32792772058.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075434ea44cb---13496789026.pdfIn PDF document text
    • http://bigpictureresources.com/userfilesbigpicture/file/verebavabaxagosiramenob.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/b123f6f729b7eeb8102263511c5141cd/49241095888.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/88254989959.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9376dc917---juneruvi.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/935921ea807bbfefbbb3d0b17ea64e85/10420728388.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/29550817423.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4793377fd---xetifi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=evaluation+sur+les+mots+invariables+cm2PDF link annotation
    • 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_off0000c798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC798 10800 bytes
SHA-256: 5268a686ebaf7535a015f8184c9fa5fc051d4bd2da4e31468ef9cf07a6aab1fc