Malicious PDF — malware analysis report

Static analysis result for SHA-256 375d68ea04bcdfca…

MALICIOUS

PDF

262.6 KB Created: 2021-09-06 22:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e386e851cce5e55525b4019f8227a0dd SHA-1: 99b7abf244d99a3e227e64978ec0df1d81a5c9c3 SHA-256: 375d68ea04bcdfcaf13899a5af8781e17d117669aa488ceb5ae26613d2eed009
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress upload storage, indicating an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8124

Heuristics 4

  • 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.
  • 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://weilandensemble.nl/ckfinder/userfiles/files/49949907123.pdf In PDF document text
    • https://bakwanudang.com/contents//files/deloxijafugog.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/rowotujewivajamafuzuxakoz.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/l97tqvad2re3rqki2k0bj8da80/23123396834.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5580dae89---16978299462.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/ab9bd1c40b17aec3da56011e273546d4/gikabu.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/dezem.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077fce8aa68d---bexolevaw.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/a1607ca9398cfbc284f97429cd806151/mitarudodusolaguna.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/35902709821.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/45096345162.pdfIn PDF document text
    • http://uchid.com/uploads/file/mafuz.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/notum.pdfIn PDF document text
    • https://onlinendttraining.net/files/70043898107.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/guvobidewiv.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/23992727695.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb0452e1bf---97807817168.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/datonidajalebax.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tomanedariv.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4c6545a290---68770342178.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/woserenapedomalasudin.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076eb8546847---zemabubitamel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=statistics+for+machine+learning+by+pratap+dangeti+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003b389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B389 21464 bytes
SHA-256: 4910d8f7c048b0f3be4e6c52bd9669b79ffb9532c6cd83ac830945f7659ccf23
font_01_sfnt_off0003ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EBF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00040409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40409 11396 bytes
SHA-256: 424ee6e236c14d95054d5c019f982523680cdec4942248fe96909cb8839480d5

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