Malicious PDF — malware analysis report

Static analysis result for SHA-256 569e9fd05794117c…

MALICIOUS

PDF

76.2 KB Created: 2021-07-03 11:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3aa8100ae9bc5afc3a22b4529cdea94c SHA-1: f17908f2302023be7c23a0d5b05ef9deb413bfc7 SHA-256: 569e9fd05794117c7ee2111f0ac52744b743606c3c4b1786776eaabb06c63f62
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting a link farm used for SEO poisoning or distributing malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate it's designed to lure users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8309

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://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608504538c923---pulukurizisarebunadisavox.pdf In PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607965a1b1548---11786210033.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcff81c7132---13038144962.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/manuneposapovireferik.pdfIn PDF document text
    • https://educhina.mn/editor/files/35509695104.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d034f2dbdb0---zasizexuxiniburovelelitan.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/1f684ca1c9b9ecb9b81d0dbfa68dfaaa/bezujenomulesonegup.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bedd743d925---zibemeda.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc4dd964e0---51846313673.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/guresezomapuwofutaw.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ecee61fe9---zibesokewoduvuvagewokexo.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/70494779857.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/dvuchpu2qd2igl1cne2o5pchv8/69452277014.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/bebijededi.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/ruveranazomirizoj.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/gazobup.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/b83d80ccc88bcaf34139ee50f04fb0bb/fotuvekapabijajotapip.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988690517f3---gavuragotukomipegibud.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/75149683588.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/83956917382.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa018943aa---jadoxaf.pdfIn PDF document text
    • http://arnold-sitter.com/CKEdit/upload/files/jagulito.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/50580abacc7d4ff96347bfe464c234e3/33779773029.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=blossoms+of+the+savannah+pdf+downloadPDF 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_off00011a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1