Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24ea43d05537f8d…

MALICIOUS

PDF

50.3 KB Created: 2021-06-22 15:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 939847c767a47b7000670b78911b2e0b SHA-1: 3b609df33ae2b0af246b6a75bfbfa30f8ca06820 SHA-256: b24ea43d05537f8d9858b0b881118adcb7c1091117188db824f524a47b1d672b
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It contains embedded JavaScript and presents a link farm, suggesting it is designed to redirect users to malicious websites. The document body is heavily obfuscated, but the presence of embedded JavaScript and numerous external links indicates an attempt to lure users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7338

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 50 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 https://area34.info/wp-content/plugins/super-forms/uploads/php/files/kt7dodeilftqc9vu711fncvst6/79384762450.pdf
    • http://ranaghatpchsschool.org/userfiles/file/71156549356.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607580e82591c---69545902459.pdf
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/kosikefeke.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/e6doqprni95fg8qljpfm3ih4f7/vufodivawadenalawonuze.pdf
    • http://pinxedien.net/upload/files/90302730044.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16087407da7b52---rasejo.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24900bd7ca---vemotozoliz.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adb70a79d11---nufuminipu.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/c5l03urfi28pdptf267clf4c40/zokivi.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/vc4cpdnh3qm4crvb729c8eufq2/50331992827.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/kgpicl3jokcn4okp8mnjvm7b43/fojesugusipiruketapijod.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/96bff9f328108f1e1ad26a94f054d269/xuwuzozuxobuwuvodob.pdf
    • http://musorcentrum.hu/files/article/file/vutowaneki.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4732545819---tabag.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f856b68b2a---dudowopedarag.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160c6112117bca---xuwuguna.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a76548e441---16175121296.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=can+metformin+make+you+feel+tired

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