Malicious PDF — malware analysis report

Static analysis result for SHA-256 8edf0d0e2fea3c71…

MALICIOUS

PDF

73.8 KB Created: 2021-07-21 20:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: d1a460a7b01539f1465953e66899937e SHA-1: e56bf84f9b5edfc8e9daa0d350c223aa44f7ff0f SHA-256: 8edf0d0e2fea3c7156fbc3e00d3173769a6fb377957ebe5dd59aacbfb13e1825
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, directing users to numerous compromised websites, many of which are hosted on WordPress installations. The presence of these links suggests an attempt to lure users to malicious sites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9340

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 http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/0878519548472ec9ab8bced12bf215ab/waderanajawisetejunovan.pdf In PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/snqsfo94l49edv5quoor14kco0/41222040506.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/d89fb43e8fcd83da438ec7ddac76520e/vesexizev.pdfIn PDF document text
    • https://www.tristar-technology.com/ckfinder/userfiles/files/nezenadusemoluleguw.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/vupunatizajusaluzefopedar.pdfIn PDF document text
    • http://isgsrl.it/images/file/lekilopepig.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a083ebc59ed---rizasuwetazigewiwiduk.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/gexojuwupadanelafaromu.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/84283976647.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16079d729517bc---kadafejo.pdfIn PDF document text
    • http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/88791520013.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160eca4e45d383---tunizevukama.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4823e9c04e---31016083092.pdfIn PDF document text
    • http://www.ximangsongthao.com.vn/app/webroot/uploads/files/vibabulora.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/vobiforexo.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b31d17205---zagasurupov.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8ccfc0d28081d5b62785b44737721595/pejajemifunujumalav.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096027c716aa---50831399530.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607420de5af58---23968913439.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4541109c9---voduja.pdfIn PDF document text
    • http://chieucoingason.vn/files/torodetulale.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=trigonometry+mcqs+with+answersPDF 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_off0000ee05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE05 10940 bytes
SHA-256: 1c9f5f39ae4ff0ae9dfc438d891d3285a45b7e1dc6eb580d938c06d313a43fb2

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