Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3255a28479df53…

MALICIOUS

PDF

62.5 KB Created: 2021-06-03 04:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b98a858384fb9661a3283532f44b27b5 SHA-1: be74bd2deed88ff1e8d46cca2acc74145b512f63 SHA-256: 5c3255a28479df531d9dff46db967f54f235ddf7dc6111b8df8f8d575dd8d562
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to host or distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6659

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da5a993d4b---4207840594.pdf In PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/bowatojegobipatavisotosow.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/67922077433.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/9006ba7f9837cca8ed47ab614ee9cdb2/lujivewisivujeg.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce06d3fb2---44196129392.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/9hi52qfv42vt9q1v66gasb55vn/jelakenizikubagezawiji.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/90554796029.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82fd170c2a---54911282143.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/50094427620.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/a0d09daf342108c108ba6685bf35eec6/xejipobibegoropedaribopo.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/57072gv88skc35n5gfl5hesf7d/zuwed.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/raxabibizegoxeruxide.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/luferupog.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/rumafetiko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+norton+anthology+of+english+literature+10th+edition+d+e+f+pdfPDF link annotation

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