Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae4623d0651c01e…

MALICIOUS

PDF

95.0 KB Created: 2021-06-28 03:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5376d58a5a9ad87e77e0375e45d0b773 SHA-1: 3f5a50b0236fe4d7eb4ca190db980ac79b4ec7f5 SHA-256: 0ae4623d0651c01e6bc2d985aca205573ce9d77583042a102b4b8ce5735d4aeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://irlanc.ru/uplcv?utm_term=mother+hot+full+movie
    • https://cplastik.com/data/cms/file/29528194723.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/c02f22916a18a5ad5523050ff411911a/firemarepededisolif.pdf
    • http://uralinteh.com/uploads/files/xipunilorotafosofuje.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/97918bc561b93512ae27f06b5d921e70/nexaxafotive.pdf
    • http://rund.cz/UserFiles/File/72954053036.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750e106de90---xiritumox.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/e3cdc6cf0fe1189eb37d6ad297885f89/mazutesuwowemitu.pdf
    • https://amitadevnani.com/userfiles/file/zufiserobusevudonazuduv.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69d6d2b9d7---binitejibatum.pdf
    • http://davidlbrooks.com/clients/868292/File/xifudesiwuxuni.pdf
    • http://www.ks-zahnarztpraxis.de/upload/files/67323184504.pdf
    • http://greatnice.club/updatefiles/file/ziwafelunuwarix.pdf
    • https://louvre.lv/res/wysiwyg/file/46626163357.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608e57bfa9efd---71187169798.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/339678611d1643f57ed4642a2b2134f1/26142180845.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/42119f3dd3ad38a80f7739676bdfdf14/6989455899.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/c4vh77mq0guoff961gc3df3vrk/pisiguwedifadikafo.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/944d0e2edc39b61f0c8a0152db7c3fb4/64658879696.pdf
    • http://pospatrans.cz/UserFiles/File/vixigikokorebari.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b89ce26f997---80219369766.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e1c94542d---juwumopakuro.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/c9824c47a42723c60dc8849f52f144ca/31218734970.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90014259880.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771eee39b07---15392544751.pdf
    • http://adaviestransportltd.com/userfiles/file/86175277135.pdf
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/7596f6dc7c7cfbae97d963d265bd5f14/59632687533.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/b0bc6cfba933182b75e62894b03aa6b1/96091652953.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e55.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E55 16792 bytes
font_01_sfnt_off0001266c.bin
0dcf16111577bcc3984ae6964398e3d7e541c5bf51d81483990a2146e3eb849e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1266C 10204 bytes
font_02_sfnt_off00013d47.bin
73b4f19e423c36ef54499312982821dfd1d359a78b4cd5c94e434e9a9b268cbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D47 18248 bytes