Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee07bc949ad3d88d…

MALICIOUS

PDF

63.7 KB Created: 2021-09-23 18:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6f7b10d39c9f8d0485fe4ba5847d7ff2 SHA-1: 662a8268f8cbb8c4d318d08dcd87a74dd9edec73 SHA-256: ee07bc949ad3d88dd5facba95629d97439d5ab442af989542dad596c2742dca4
154 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7270

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://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/rakobenigatazinomemusufut.pdf In PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/4bc12642a43d80fcdc770231ed3a6916/79340972820.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/sivadazatix.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/kitagevujagezepusugeje.pdfIn PDF document text
    • http://innersolutions-uk.com/file/sevekojovoropusopuba.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/fofupugak.pdfIn PDF document text
    • https://galaxytraining.examinationonline.com/files/fedoxeletikuzanofuwuwaru.pdfIn PDF document text
    • http://8njl.com/userfiles/files/75628606095.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614b33ee9196b---julujaxusotaketoga.pdfIn PDF document text
    • https://llbyggodesign.se/UserFiles/files/lilejuvununefuwipit.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/1359488226.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/jutatekirizerunuxaro.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/4721258057.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/xojodusulerirapojijupetil.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/fifegejifavamujizijuv.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090411000038.pdfIn PDF document text
    • http://wixoon.hu/upload/file/jugivarop.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/34573384813.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/wezimobemubuvorafobifer.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/rivubukebow.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/liwakufezona.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/wozujawebav.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/968068750.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/b0a013c761020c53df2bda1df7c4d6d0/sufomabexipoloro.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613890f33c890---xanimami.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=percy+and+thaliaPDF 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_off0000d82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82E 10296 bytes
SHA-256: b30fa74dfc65959117dae16e611b5c5005932b072410f2db4100e6461b3a69ae

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