Malicious PDF — malware analysis report

Static analysis result for SHA-256 f26200841dc99db1…

MALICIOUS

PDF

70.4 KB Created: 2021-08-01 21:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7590c774e9f00c5becc15ad7c7551cee SHA-1: 8b734a1ea09af85c2e93d5026ec6546a6762030b SHA-256: f26200841dc99db17d1c384d44e5e4efae0b78abd6d309d76bdd647cd6eef4b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malicious content.

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 http://schmetterlingsgaerten.de/file/famavela.pdf In PDF document text
    • https://marljivo.hr/UserFiles/files/51145275933.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ddec70d0746---jisuratetoxifixawaxa.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/98871941331.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/38709653576.pdfIn PDF document text
    • https://pellevah.com/upload/files/xezoneridoj.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/13415950545.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/wulalivewuzelugukufepukit.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/68067449537.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210604040953.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8a41c467a---63964140795.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825c01b4e6d---vefonogaxifax.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f036a76bb8---vojuzita.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bac67544069---14539493487.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/65a264e9f247b04905134fcbc6743062/komopedexejikilal.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/14064846853.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f5e9ccc148c50ebf84afe2dbdf7e4ddb/rawivif.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2cda87c22---taxubevutivitor.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865ad616e1b---47172052272.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ff31ca423---wimureweruwagogilemota.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/89671671496.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/gizuwerig.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cb7440f1c---50763083685.pdfIn PDF document text
    • https://makenie.com/upload/files/54879061781.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=schumacher+battery+charger+sc1309+instruction+manualPDF 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_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 11620 bytes
SHA-256: 27745f7ce1a56a574de95ad35c53620015a3626e3e95e44c951db6b1c2cf1ed6

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