Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7383d9ae220ed7…

MALICIOUS

PDF

72.1 KB Created: 2021-08-15 21:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0809920625a8166c992f0fadfcbdad9e SHA-1: 296f4c0df548b6b481dffa13549532b2dd1b5ba0 SHA-256: eb7383d9ae220ed76b2850a666816139b47cf0033d8b00d0b38850d3edcb4161
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites and other domains hosting PDF files. These PDFs are likely designed to exploit vulnerabilities or deliver phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8414

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 http://studioingegneramato.com/userfiles/files/20317206180.pdf In PDF document text
    • http://www.pattyn360.com/upload/forum/files/belaxerub.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f548cc924f---74637494812.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160fcc5432878b---6063502438.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/60994282859.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/mitugimabogokesozelofopo.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/be01ad4556e0cf7bf5e1e51414ce8367/71069782187.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/36150288632.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/4q06ouqkeai3i1803s43ofsep7/womawanojemofofezigib.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/a55e90164c92a3e412c8b9eaa75575b5/notolujul.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/gobul.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202107/file/31300948300.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/eb5f37b09bb146d954617e923611f9e8/10927993317.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee52ac2c14---52491754293.pdfIn PDF document text
    • http://att-na.com/upload/tezawoveme.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/812c0a1d05519d2a84df1b64ec1add43/96210242788.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082ebc92e0f2---nosakonipolizelorazumofef.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/xurubazufepesosimez.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210613130742.pdfIn PDF document text
    • http://falls67.com/clients/50406/File/viginerameganemapumoxefaz.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/24434549773.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/94717967303.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/18796818895.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e3a210fdd---wugufofowezo.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e142f166e---60044010174.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+change+from+standard+form+to+slope+intercept+formPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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