Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ff57f01ee40f62…

MALICIOUS

PDF

66.5 KB Created: 2021-07-18 14:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7e66759f6190cc58e0c3e29bc33ed657 SHA-1: 8ba9ae50c6e51c69e6b4a4e45f2673e4c729ed85 SHA-256: a2ff57f01ee40f6256a54cf6c1baed72d5eb85a3a60570c98ea7c29a3a440382
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as containing a link farm hosted on compromised CMS uploads, specifically WordPress. The ML classifier and ClamAV also identified it as malicious. The presence of numerous links to potentially compromised sites suggests an attempt to lure users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6824

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://quiltingacademy.com/fckeditor/userfiles/file/51882754774.pdf In PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/kemexapuzusalenidudisi.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/4dd430e9678dc76191c52fe2d17a3e0c/70806338528.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/oo4e9f45bkgs48enpbktkf7r82/25410807231.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8da771a9---66894864405.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/mokosegevudiwaxamalanufeg.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/gukanikatew.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/9ek92l24d283s737rp1rtallhu/febegosu.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/6303220a041d7659a332ee765536a269/67947273145.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/regapopemotarivi.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/2f3b67a36dd63521b33236fee6feff2d/11682931633.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/bcca0df5f7eddc7e431b78f423627181/kugijoraworiz.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/litodikew.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/a4fb2ab9bbaca53e347809df4c3c30e9/dibawagalinupoverebojiwo.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b711ddd308f---74700457051.pdfIn PDF document text
    • http://sodrex.pl/userfiles/file/muvapumawug.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/u04g2bd7g2g6rv2gqkcon155h2/bamarim.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e7bf7b7f8da---72520488392.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/84945086885.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/e1cac12638a2ceadea4739ab9db4062c/gudufojozuvuvonunagor.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/1997145813.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/wotimuxapudileral.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53e7fda519---xoxizudilinimom.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/24195606739.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/kixinepez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=stock+index+meaningPDF 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_off0000f18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 10668 bytes
SHA-256: a360234cd716bc451ab71b9c3e4eb6ae14d5f5de0c6931c253e4a58d450d40c7