Malicious PDF — malware analysis report

Static analysis result for SHA-256 3169d339948cc93d…

MALICIOUS

PDF

44.8 KB Created: 2021-06-23 13:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 66cb81e0b94373c6537f67c623215756 SHA-1: cc9d9b6b138c8b0cb07a38b4127b3cfb342683f8 SHA-256: 3169d339948cc93d69401c7d6d5ba3d2cf2ac41a9556a1e0a2c33091fa970746
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The document body, though heavily obfuscated, suggests a lure related to 'New song 2020 mp3'. The ML classifier and heuristic firings strongly indicate malicious intent, likely involving the distribution of further malware via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7750

Heuristics 4

  • 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://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee004aed22---81011196939.pdf In PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160987f43dba70---xipujutekukejasivujebo.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee19e49a92---vonexomanidosesidevuzo.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/8e8f12adf686803b8395f5ad7a4d1a59/konaroritebem.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/telowid.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/ffa9b37c427110f83dbd293ae7a92ed9/56248673974.pdfIn PDF document text
    • https://aedwea.com/upload/foto/petakobomabo.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/dudut.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094f8e307699---jakitev.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/57234160974.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/46468b75d32645c765cef991fc4367c5/soxelotalogizarisipigi.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/68500858101c71392de1c0135956109c/32180766631.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/6nduq5f3nlokqpgc2obat51pb3/saxubamikupomudanirisuduw.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c950cc6d75---34889986127.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9834c303c---jutumokigepulugodok.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210615200241.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/0fe5464fc9d0d02ec8454159d0745b4a/kamogerosivijitej.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900e575c477---68051936865.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=new+song+2020+mp3PDF link annotation

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