Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0dd4838f4ea2e7…

MALICIOUS

PDF

70.3 KB Created: 2021-09-21 02:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 12558342c6e24aa1ab9820f3633531f1 SHA-1: 04a1c73a75d6eb0bd38572b5802f5065ba9f4049 SHA-256: 6d0dd4838f4ea2e713f66052d1f9e479508c153d012e362ea71c44f8bb17e695
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs pointing to various PDF files hosted on different domains, suggesting a link farm or distribution network. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links, which is a common tactic for malicious SEO or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://yogasol.cz/ckfinder/userfiles/files/zigonilazufugesuza.pdf In PDF document text
    • http://madiagranitosilano.it/userfiles/files/wutunigoxulugoladeke.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///96240405988.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/15502337429.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/43231079715.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/10785203253.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/pikogukodun.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142b68a723bd---kefinovutalilemebikuz.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/9637964147.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/2613068474.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/11935424136.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/672657299.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/va9mcj9r9ir7bvkggv2fd5r726/daboposufokiwinek.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/guluvawetujuk.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/93161905056.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/74338055714.pdfIn PDF document text
    • http://schokobrunnen.com/idata/48601472207.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/guxabipiwexomefinorebiwas.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/48558473402.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/45704701011.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/rafifine.pdfIn PDF document text
    • http://audiohrestomatiya.ru/content/file/90508874955.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/dalipulujenepafo.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/36778285399.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=mile+ho+tum+humko+audio+song+download+mp4+djPDF link annotation
    • 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_off0000bed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED3 11216 bytes
SHA-256: 15c6d7fe9e64a5e55872c16ab9f05f64bda3cee1c1cb27494fa6f01dec88c52d
font_01_sfnt_off0000d8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BF 18976 bytes
SHA-256: 650833f663011f2d31125b9e034f606255838ebab8a953764c0b6b2fb8b3aa47