Malicious PDF — malware analysis report

Static analysis result for SHA-256 93553cdd6bcde248…

MALICIOUS

PDF

66.4 KB Created: 2021-06-25 01:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e8f4bca9d1b2d414d58df390af632330 SHA-1: 04af1b14d16d3efe71f6189f0d93c66ccc1bf469 SHA-256: 93553cdd6bcde2481513d79ff27deffaa5b5e35ff7ef9349b721d821598c3a1f
94 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8209

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 https://archism.ru/uplcv?utm_term=depreciation+methods+with+examples+pdf PDF link annotation
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c9759688e8c---lapupanazodimalufi.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/b9f85c399000cb6847199eb7d79d210a/34860299716.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bade7b6efc7---jumimagoniratezebe.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f119e3a5ae---giloke.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/98331618234.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/sakoketitivojovo.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609877506ccac---94308307554.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b6440f0f2f7---32633730984.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/tugitu.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c294d70a60---kexosiwexegavofebusib.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/kivikidotuxojafav.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/96b75f6d75c1f966ff7a2db60cbad674/diges.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/63307084934.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a752d8d8f06---vipovorekeromali.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/3487514740.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a009556b63b---31152250722.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/67970098014.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF938 5556 bytes
SHA-256: d336bd8325b87c9b20e4aeced90c265f5573dc0b47e39fd21e59f4bc4785d8c8

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