Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fe16af90513ad7…

MALICIOUS

PDF

56.9 KB Created: 2021-05-23 22:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab360f6d6f1dee272ff33d5e9439ae5a SHA-1: d4bd6c82b727ff0b944d2d741d7b0190a3a40d5e SHA-256: 99fe16af90513ad71d0b7cec4684582b99deccd3ccd6e57a38432084649467a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to data recovery, aligning with phishing tactics. The presence of multiple external URIs and a high ML score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7658

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 https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/8cnhou3t38jmp0g31tcv7mcv4h/76529465335.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/eefbfacb180afa27ba023317fa9092eb/63819904456.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/sicuvk4guvfibm1toitks8deld/20621457488.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/4962152e2daf3bb6d1c905f1c9b5fb08/sukuxotolasibelubor.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/e3d2a2cb160ef9fc32b1a3a5b66c8672/dozewixizetodu.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/45dfafeb274b6398b801579f067ee1a5/jelimapefifazu.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a751779da77---9833750951.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/5283fca5eeda690c59479cfbe9b8130c/gefim.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072adba83e46---satetewa.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978a7db1ad5---sepunaxuxubelalebufalat.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/klfjgihc004jttmr4v168hh4pv/sinagitegokukuk.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d338e7b9c3---nozuwegogesu.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/7aa15fe7e1dad7c1458253f2c1f8f531/sisurevufapazobez.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160921f29196b1---49642543863.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c8598160a---79984749946.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/75127a3d7fe6c3431348d80fe46cbed5/57861772942.pdf
    • https://chmelo.hu/sites/default/files/file/70657312367.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=can+you+recover+deleted+pictures+from+an+android+phone

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