Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d22e171debf643e…

MALICIOUS

PDF

67.9 KB Created: 2021-05-19 18:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: def46ff1b5205250f27539e8996cc422 SHA-1: 3685500e31e1aa4b5edb5fdd51f1cefac257c1b9 SHA-256: 8d22e171debf643ecb14d7436300221a1c321e91dd9d75181b8f463a3e41888e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to distribute malicious content or redirect users to phishing sites. The presence of multiple URLs, some hosted on disposable domains, indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9691

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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 https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/07a313164a33926beba5b6423fed5c5a/30028078381.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/704847740635728e6b6622d89bb7dbc2/delapexowiw.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077abf8a1f58---zivoribofedepuma.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/0941a328df1ab3210986bdd657f32faa/gatiboduvofere.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/eon6lq6gpaq568ke0nm34leus5/40489981235.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/070739a6b57b987b8c0c4fe8c85a99a3/jajitogobil.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ff6121113---fugajikazodezagaxatanefa.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775ba76bf6c---puruvipulexobosamejaxediz.pdf
    • http://ricarda-allegra.de/userfiles/file/nixupokuranor.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c7e917880---tativepogitame.pdf
    • http://al-bandak.com/userfiles/file/kafivi.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/mi5hrmvl3a8s4a2lqq36otclof/nefikufudamixetuvanojimut.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a28b837cb72---tegefudul.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16077909fbad71---76213354995.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9282dffa6---49356586585.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b93912cd21---21973061035.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/05toek9635n4gmc3igsoot5clq/56304756911.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=c%25C3%25B3mo+se+reza+el+rosario+para+levantar+el+ni%25C3%25B1o+dios
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d622.bin
5554ad28cff255f6b3ded68c53e4184bd77f9d94934484d2fbb66f4e8fd4807f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD622 5468 bytes
font_01_sfnt_off0000e828.bin
7d5edd007d949e358b04f8717a14e61c019b05a3137deabf78baa0a27f4dea9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 11492 bytes

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