Malicious PDF — malware analysis report

Static analysis result for SHA-256 330e0aa3e1c8431c…

MALICIOUS

PDF

88.6 KB Created: 2021-07-31 13:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b5a95c295c7de8569b4cd09926cfc33f SHA-1: 3b416099d98c0a30c996fe851b353ab07e2cd926 SHA-256: 330e0aa3e1c8431c6d2716da66d69171b9038f202b017c22a38853eb6a370ee9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. No scripts were extracted from this sample, but the presence of numerous external URLs strongly implies a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9518

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://mai-colle.jp/userfiles/file/winamafejenoja.pdf In PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/4f0983a9d46da84cce7b734499095182/29548644523.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/iuj8c0oh0kr44cmqib9eeokfs2/duwemigilogim.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079cea0f34fe---laneri.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/60131886982.pdfIn PDF document text
    • http://walker-doss.com/clients/4/45/450b4a4af5ff3f13851793278d9c7ef8/File/jomidebunupasapasodukaz.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/8fd56f2ca27738c0cf12fb4a29e45d6c/21829483671.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/bulebig.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///18769314644.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/pupozaduzozegum.pdfIn PDF document text
    • http://dchs1961.com/clients/871949/File/tefala.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/tokabegupulotevap.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a7b31d0f4---sawulataworal.pdfIn PDF document text
    • https://mauspro.net/upload/files/85717905219.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/84312224326.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/g9vo46hpqp6jl5d6ufbg9ncn52/tororifel.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/kavidosinikidonapiwebolif.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210722_763323F54C6E1673.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/3256a7ebf4a25b791713ae33a30d661b/nifagugubedenutewaf.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c9683de6d---66188747023.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/7culscjujfg3pcin7rh5h5no72/jizimesuzirovatumidanudat.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716bbac57ea---1850555824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=does+popeyes+give+a+senior+discountPDF link annotation

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