Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce751b3cf3d0a4c5…

MALICIOUS

PDF

73.4 KB Created: 2021-09-17 17:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1af92f3b790dc1bd5ca818196ec782c5 SHA-1: 558f19425f44f11a5567f34b06b9d7706ea1a540 SHA-256: ce751b3cf3d0a4c5ffbe478379c004c2800198925f95550afd91be471d0c22d7
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to compromised WordPress upload storage and other potentially untrusted domains. These links likely serve as a lure to download further malicious payloads or lead to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5832

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://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161332a27d5ffe---17516675928.pdf In PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1613122ce19ea5---13980051297.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/xalufuginisumovomarogoze.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/wokawenaj.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/56121802226.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7b886f58a---12188876403.pdfIn PDF document text
    • http://toonesk.com/upload/papitobabulese.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/tononegajolefupoxelidin.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/35978765827.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/87248077044.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/75262555878.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/97688994910.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/ponawa.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/wakajefawutirurubu.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/gavepubopobizis.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/poxupedekubivorisonibuf.pdfIn PDF document text
    • https://ms01bet.net/contents/files/11101082586.pdfIn PDF document text
    • https://hse.tw/upload/file/negofoganemofebeloguput.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/nelovawiganixipujosid.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/kipegoneperaj.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/71202625999.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614024dbe9aed---botokekomesosineropunos.pdfIn PDF document text
    • http://sbkf.org/files/files/bexoza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=magisk+manager+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AF 18612 bytes
SHA-256: 916a5f9358a693961fd8f04a60b3c27d3872dc191fb9c2ae418f1d1743698f4e
font_01_sfnt_off00010939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10939 10416 bytes
SHA-256: f575ccec5e9c224f55a439338e2ab36dc7259189e518f87f733929cc59390d7a

Open this report in the interactive analyzer, or submit your own file for analysis.