Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce07f5db7036e741…

MALICIOUS

PDF

70.3 KB Created: 2021-08-19 20:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6338e32a364527e9db7d04d4c5e79380 SHA-1: 376b8fdf46628be3725e915d7d58496d8350c74e SHA-256: ce07f5db7036e741b56ef41c6ca86eee8db205f6cea6f25fefdead71790cf8b2
94 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the nature of the links and the PDF structure indicate an attempt to direct users to potentially harmful content, possibly exploiting vulnerabilities or leading to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7644

Heuristics 4

  • 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://dientrotiendathc.com/media/ftp/file/tuwipugolajimelu.pdf In PDF document text
    • http://tnslib.su/userfiles/files/woxujemijubevojexafawi.pdfIn PDF document text
    • https://isleo.com/i_photos/file/kelemuzemexikiperifasik.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/df035358c6f5a5b45ceb1aa93f36b007/55468380206.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/43134350194.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e005c10ba---zasomorovusezubabesukud.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f15a911ee---36050291011.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084b6c298107---92623953647.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/3ee22d48568cc3d20fba1b6be2e92e73/34520593238.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091e9f4a4d4b---63591904056.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160e70a46dc434---82487403460.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/65199c18036ff0901cc720b521e1949f/79285018211.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/ulacncpak902tvcm59m5rjag9k/65991089436.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160778af976402---67838175677.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/tezevosatikesoxuwuvud.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e4fecea28---14809040123.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/riwomamavadajexigu.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/53abb1049f0c435f58af53a397ab97df/kanijutoxejozeme.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/92850982945.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c07c95736bf---mekavatepefuxifumapomu.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/nubik.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/88487651633.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1627814703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+unblock+any+game+on+a+school+chromebookPDF 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_off0000eeec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 11108 bytes
SHA-256: 777ba0c81ce9767094e257befcd9c39c3e0ce832f4bc96dafbec26b961ac3281