Malicious PDF — malware analysis report

Static analysis result for SHA-256 9070aa5c0bc1eba6…

MALICIOUS

PDF

80.4 KB Created: 2021-07-23 09:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40cf1e843a2e3329537ecde067453a68 SHA-1: 9c52e522c5380bac22e3cfe05ca69c1d09be7e23 SHA-256: 9070aa5c0bc1eba64592760c2259aea00aa96d62cac201d014251027daa31f21
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites, indicating an attempt to redirect users to malicious content. ClamAV detection and ML classification further support its malicious nature. The embedded JavaScript likely facilitates the redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6637

Heuristics 6

  • 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.
  • 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://grupahatak.pl/admin/_fck_files/file/vivimefazufovafeter.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/e6b5ab7fc054cdbdd006960d0010fda9/gobibezekopukixomovowez.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa4b4bc441---45601772723.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072f9f62aaa6---misijasotelube.pdf
    • https://daaeportrett.no/upload/file/67304713862.pdf
    • http://upsshop.ru/ckfinder/userfiles/files/68426994363.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607297eec9989---25462801994.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd329edeb4---binidodemukaraxexa.pdf
    • https://hanyauntuktesting.com/contents//files/wafavupemifefelajilitig.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/vg90pel067pf14oknp9h1ct9uu/90332658629.pdf
    • http://edwardlankin.com/clients/86087/File/gozeloguzasux.pdf
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/witog.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/4c5126cb9843c4aef03a1822d94bd8fe/66980128209.pdf
    • http://konditsionery-reutov.ru/upload_picture/file/merubudekopumetuli.pdf
    • http://bpabv.nl/uploadfiles/file/62923060578.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/45621bba721a745ae0d7913c95a9b392/vusawiwowuw.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711d044e57e---sewuwesusubejumamemalago.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1f353923d---62570478973.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe0c074e37---zeteziloxiroraj.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8038d13d2---35881680563.pdf
    • http://ikuma-car.com/js/upload/files/25547204044.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce265e26b03---77427891856.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c40c514b---rukoviboxasoxokusafovok.pdf
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/barese.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=charlemagne+and+william+the+conqueror
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe2e.bin
16be0d02317c9f4e6598d06d2c873d1dde88f1bdc5b6783981f3697c87bc6ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 11012 bytes
font_01_sfnt_off00011724.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11724 16792 bytes

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