Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cf5f42b10f57ef…

MALICIOUS

PDF

72.9 KB Created: 2021-07-06 14:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bd20c6898b25bc6e9f2a22869ecac248 SHA-1: f717c09c756d39262a1b0392a770b425f759abb7 SHA-256: 24cf5f42b10f57efc541ad4ea200a78df37f9e5c7f8402fb8f18ce24464b8c72
64 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to compromised WordPress sites and disposable domains. These links appear to be part of a link farm strategy, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, and the document body was unreadable, limiting the analysis of the exact payload.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 4

  • 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://allytemp.ru/uplcv?utm_term=above+the+line+book+summary PDF link annotation
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33205bc76---nesadedexikesipapirefap.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/xekusikilitinalebet.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba14366b3---kawewezifore.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d37fd4fa64dbdd3ed07d01eba6327eba/wufekebutigepuvuwuzozeruj.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021043009263128.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/c0ciu6491c6l11hqdnv3mtlar1/23377651300.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c99dc60455e---noxevimag.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082a618f0fa1---giruxabopo.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/3fbc8095fadf82bd5600e5f3e3aa565d/niwefunamibatiso.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/2f9d3dka6asqga7f83r3rok4t2/degelelidumekexi.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/44725927180.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/e0e7cfef47c3511fc13460883d85c19d/7230184470.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3ce2ba44a---15428905610.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087322f8283f---jovik.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/64334968866.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075b08eab2d6---dilowexojanogijumisijenud.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/92b1cf192788928764dd09f308d7a385/bifutamovumupo.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0ea7f61b72---28827759914.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/danagaxalegekabux.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160877f3911eee---muvulapidamapedujoposebok.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160af9beef33c0---35300793578.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/56e6ab1d24698219a895abba43fdf30e/ligabeluborofaparisu.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/fuganakupaluxiloj.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 10864 bytes
SHA-256: 7dff58dad7b4a066814ddc85216352b8f2c70c4cc9fef0ef713709a5a1addeb0
font_01_sfnt_off00010a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1