Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cade6c25448e21e…

MALICIOUS

PDF

80.3 KB Created: 2021-09-12 12:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b405518fd4d39a6a9ea08233d2879e75 SHA-1: c9da434c04bdbddfcea9cce1b402f5510033a60f SHA-256: 0cade6c25448e21e9884372c021ca59b280c951ab3771d70c3ab7fc663a65adf
132 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to link farms hosted on potentially compromised or disposable domains. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript indicates potential for client-side exploitation.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4862

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://burningspearmarketplace.com/js/ckfinder/userfiles/files/41937884988.pdf In PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-7/20210907220445659953.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/54256583635.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc88146f64---30230770135.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613a754dae1f0---fifemu.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/51334587136.pdfIn PDF document text
    • http://algarestofos.pnh.pt/js/ckfinder/userfiles/files/19895796124.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/pugaxopazanuv.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/23769550146.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/lirumafetexuf.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/97552551157.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/xuguxotepibujefajo.pdfIn PDF document text
    • http://sun-eko.eu/files/file/sijalisilekirijevomezapu.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/208164610.pdfIn PDF document text
    • https://zzwgjx.com/d/files/98665153512.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9ef716400---xewedinomuvegupegek.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/28411197413.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/44908405558.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/7200502251.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4ecc03df6---kaxaxokakituvazowabis.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/tubenazavakupasipipaseluv.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/vevezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=instagram+followers+generator+websitePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB1 10732 bytes
SHA-256: b4f7bbc153981dcc7864b4932f710e32f6891a7c716e3bc20c4527b587376095
font_01_sfnt_off00012665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12665 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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