Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f953007efbf1b0…

MALICIOUS

PDF

61.4 KB Created: 2021-09-07 22:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5f85f4165dba8f36bb60442e5e958bd5 SHA-1: 3de52d23cf7a667e0319df6a1c1dbd7582df4bdc SHA-256: f9f953007efbf1b09144fb40d8291c1367e466c7d7b66873718988b927cb73ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and link farms points towards a strategy of distributing malicious payloads or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7265

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.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106cd269c02d---94683384268.pdf In PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/34790bd54f690eafbfaddb505d90431f/29521316958.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zilujebawegowugox.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707151618e2---doxokakoxesazup.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16085e0ead6211---rotapudanudirewumeri.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/af04c098ac9ba9b2a1e9d0b4f43a3d00/65236120661.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/15495095647.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1611d73b87162f---4363887096.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16074c9cb6372b---puwovelivolapopew.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/fafibofurak.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/vazuzifeluwig.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/d03cacb46ca2dae4f3fa89206cb3d627/vuluwijarofuwo.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/98687626279.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/69856407870.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93949590327.pdfIn PDF document text
    • http://polkovnik.su/upload/file/34123527173.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/bimazomajelizobe.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/84010145629.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/rokejojalifuv.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/4029655471.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/gotamexaxiluzutizo.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608069b2c92b0---97211801244.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/73cd7c0ecf5fa0bd9f105f981dbe34e6/34094682796.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=income+tax+act+malaysia+pdfPDF 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_off0000c7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BE 17572 bytes
SHA-256: e4c07d5aed80ee7b1b0e53dfa9f332a1bc213c88dac4478f8b5a0d3e7ceccaa8

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