Malicious PDF — malware analysis report

Static analysis result for SHA-256 9469d8a9a438e429…

MALICIOUS

PDF

87.1 KB Created: 2021-09-02 01:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cd5135c806dd465a2ff78b2ae67b5405 SHA-1: 5f0933c94722828b1f33dfc659910194b1390bdb SHA-256: 9469d8a9a438e429cb90cb74127a1df57aff6c024fc54d1360fea7a909911cfb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains. Several of these URLs are hosted on compromised WordPress sites, suggesting an attempt to leverage legitimate infrastructure for malicious purposes. The PDF's structure and embedded links indicate it is designed to redirect users to external sites, potentially for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier clean score 0.1749

Heuristics 5

  • 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.
  • 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://garglob.ru/uplcv?utm_term=virtuoso+meaning+in+tamil PDF link annotation
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a177be8572b---xopilofanetuk.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bce641a626---52839806676.pdfIn PDF document text
    • https://andrejc.si/files/file/femitexuz.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/37836189625.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/netidojufusogaz.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/99367043549.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/20205176272.pdfIn PDF document text
    • https://dacsanmyhuongbeti.com/app/webroot/files/images/pages/files/91935289720.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/kimiwovupufudesemori.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210816_E3123A204DDEB374.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/86570557805.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/81f14cd2f01f0b04d07fb8cd9bfd3602/59405072961.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081164fe7f26---15614423185.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/21575268260.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609841bb63e76---dejetix.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19d47a2181---82356959067.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846aca9e5f1---bimimagel.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/48863781408.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089e6addfb11---texejimefa.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102fe9ab35e5---poxadaseluwuwinazonigojil.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/ledewufona.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/11855936338.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/jidusarunovewivazevo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000cf78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCF78 16380 bytes
SHA-256: 8d7b92e52e4560199d2f3966af72c0a0aa1e586e56207ac3014dcfc126438d87
font_01_sfnt_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 10520 bytes
SHA-256: 8a95058267da89f96946dae97a25cec6121f2fa17f4c7c50d482191b24eefccc
font_02_sfnt_off0000fe0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001161c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161C 22140 bytes
SHA-256: f3d18d1fd70aa92713fad4ad62a54ba0a790a988afccf62894e343d118603279
font_04_sfnt_off00014e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6A 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc