Malicious PDF — malware analysis report

Static analysis result for SHA-256 deed9caa0e8333c2…

MALICIOUS

PDF

71.1 KB Created: 2021-09-01 15:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 371569c6ebc30782f9b4aed12b14bf1f SHA-1: 3dbc07692e44315622211929ac57c05bbbd30233 SHA-256: deed9caa0e8333c2af1242420ec546990ec693752b28fd53822b05fa0531966d
154 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a Pdf.Phishing.Trojan. Heuristic analysis indicates the PDF acts as a link farm, pointing to multiple compromised WordPress sites. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9502

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.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2675e199ac---37605420824.pdf In PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9768da2c4---fadonad.pdfIn PDF document text
    • https://wrd13.com/force/file/73193141444.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160af80bba73cc---84624741161.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/6df7e7a426e7e03953730bd7c73c6e8b/vavekanudarovosiborulan.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/a892c6805fed4fd1bfb4e0cd53cdc3d4/59539992079.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/52819072404.pdfIn PDF document text
    • http://boletin.alicantehosteleria.com/lib/ckfinder/userfiles/files/57801861550.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/jevamapigitunebowusowuxo.pdfIn PDF document text
    • http://atya.eu/files/file/93994983693.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4ff439ec1---31398227654.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/90081217510.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/52478482419.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/nodonixeduzupapa.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606c94122e901---bafajukoboregowobapanuw.pdfIn PDF document text
    • http://rosswellbulldogs.com/clients/b/be/bee1e50a814ad4ba40998340b8964064/File/fipajefudi.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b1d51882e---mafebekerujavetok.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/susunomixiji.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/ot2ftu8vlahi87p89oc7g8pom3/43990558227.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/mowenakori.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/26109776845.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/53167906941.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=assonance+in+the+tygerPDF 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_off0000e8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A5 10556 bytes
SHA-256: 7d668bf09beaaa6f5e14ae6764930802b8e1cc441bd47502709e2cce7595bc94
font_01_sfnt_off000100c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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