Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b751949e9f91b4c…

MALICIOUS

PDF

77.6 KB Created: 2021-09-15 15:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4daf22ec46c3fc3dc0b1a1297dfd5ed0 SHA-1: 2dbf0ebe4e5e8bd5a45eff2862fa69a97adf3687 SHA-256: 5b751949e9f91b4cc0be8a325795f913971638c193c0e89ef4ac60992e3c0f38
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as a phishing trojan, supporting the assessment that the URLs are intended for malicious purposes such as phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user interaction.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3127

Heuristics 5

  • 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
  • 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://catamma.ru/uplcv?utm_term=data+link+layer+protocols+list PDF link annotation
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/gedajibolusofituponijo.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/pigaweboku.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b8db8919d---48323816722.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/21337198099.pdfIn PDF document text
    • http://mcdanielz.eu/files/file/gakuwavetawamit.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/47877943840.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/fozipugitezipul.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/35531968542.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/44695138847.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16134f6f41e765---73452300179.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a8701bf4c3---tesobukutetado.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/uo3k19lm2r7c23ie5inn8vvboi/kanowesalopanekoxita.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/41628426587.pdfIn PDF document text
    • http://kd-council.com/upfile/files/51506286254.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/9973152646.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/goboreziwokonomome.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/dezosuzisifazum.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/12698429854.pdfIn PDF document text
    • http://qzgj.cn/upload/file/mikobene.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/75749344231.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/77255603217.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/22608797807.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/zonowaxogonasekopisoguf.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/85746d779d5c4125833e791008ac4bd8/nurezifi.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/30089328462.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/dajajij.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_off0000e886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE886 10576 bytes
SHA-256: 9e0266f989f481d7a159625375dcf1793ccdde0c0326cb7175574e62fc34976a
font_01_sfnt_off000100ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 18720 bytes
SHA-256: 620cfa0bd182b4c4b8c8b9aaa300edcbb80d0b3993fd0fd8b095874624e94a7d