Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d21d86d78adc1b0…

MALICIOUS

PDF

55.7 KB Created: 2021-07-13 16:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d9c466f63d9a47ad13ee15b32010883 SHA-1: fdfaf450e22e3c057c97fcec47fdbca7aaccefdc SHA-256: 0d21d86d78adc1b0bcabfbd0f0cd56c981d7b47f3028d4e09cdf15ef439f1892
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and a link farm pointing to multiple compromised CMS upload locations. The heuristics indicate it's an image-only lure designed to trick users into clicking, likely leading them to download further malicious content. The embedded JavaScript and the nature of the linked URLs suggest an attempt to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5222

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 55 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0f0840574967e71e659d5a5760b211d5/43335484411.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbab923cb96---50115263364.pdf
    • https://arrayamed.com/userfiles/file/84911954334.pdf
    • http://metall-press.ru/files/73033957374.pdf
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/fmtc1jbc5j9ljq44kk69n3ao2g/vefudozobo.pdf
    • http://biosite.ru/images/news/file/33596631497.pdf
    • https://khotelmarket.com/FileData/ckfinder/files/20210618_F9AA0778BDB41D15.pdf
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/85611003011.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/4gclv72cep1rlgfbtup4oacgoj/78992029174.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfdd11ce687---wunegaxarutin.pdf
    • https://m-isc.com/userfiles/file/xosegojasugodidugonad.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/ef561e530ebb9d522b3386ed5b38078d/torezajaleron.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da99e6c03e---2830769880.pdf
    • http://alarcon-v.com/editor_upload_image/file/11558005350.pdf
    • http://ilksolar.com/Images/Media/files/94661511287.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f132a05e9---91657264484.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba49edbf35---musonifenofukezomojop.pdf
    • https://finatwork.com/userfiles/file/boxilafizegewoxisokukixiv.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/8e7758d92e7c772147bd742e5fca064b/zerozikigavanajowumot.pdf
    • http://kochamsushi.pl/UserFiles/file/86453919384.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/1626b4f2b47b5cf7d72775c499b852c9/wanafawowipogisenutoxomol.pdf
    • https://imad0c0.com/js/ckfinder/userfiles/files/71027499829.pdf
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/31336768299.pdf
    • http://derkwoo.com/upload/editor/files/nawuwodulozigefivig.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=papules+on+chin

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