Malicious PDF — malware analysis report

Static analysis result for SHA-256 58746d20711fd38d…

MALICIOUS

PDF

170.8 KB Created: 2021-08-17 08:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 266896c2fe9c09e2a6624b39dbdf202a SHA-1: 70d141d9e332bea6a08d6ad6b3466a9ccbef16e2 SHA-256: 58746d20711fd38d6b00c55310dab349282c627c406b03bc60422a2700c2c513
154 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malicious content. The presence of numerous links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the true malicious intent and improve search engine ranking for malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://aloeverajuice.cz/files/file/salobamidijezutubegisufe.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/97977941773.pdf
    • http://fujavietnam.com/images/Download/bitawunevatomoduragaj.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d90441b2ef---77092292673.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d3075604eb47980bcc2e62bdb54b593d/merasubi.pdf
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/1861203335.pdf
    • https://www.nevjegykiraly.hu/userfiles/files/fedekopinuninatu.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/e9e728b167b87ab698f4fb28a0c6aaab/golefepevawerafujonijiwas.pdf
    • http://getem.plfiles/file/66771104607.pdf
    • http://giasuthanhdat.vn/Images_upload/files/dazitobazijinexomogov.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160f3cfd0ed890---momudajeva.pdf
    • https://art4you.sk/editor_uploads/system/files/59533179220.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/u754q6c5bgk3d8afhg4fnnple2/xozewotavoxi.pdf
    • http://szyldkj.com/luodan/images/userfiles/file/varuwaxupotuf.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/aebfd89c11ea99a8dfa85e39d569861d/47719206008.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=wifislax+2020+iso+64+bits+download

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