Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b6c3ef5be8eabb…

MALICIOUS

PDF

63.6 KB Created: 2021-09-05 11:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 187c556a78c8925cabce7e68e19376c5 SHA-1: 40bd85c1c60d22e117905ad94d8068f8e44c235a SHA-256: a0b6c3ef5be8eabb3aa9578306babaee60e13a1a495fd4224dcd2cba7351905b
154 Risk Score

Malware Insights

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

This PDF file contains a link farm pointing to multiple compromised WordPress sites, specifically targeting their file upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links on disposable hosting and compromised CMS uploads suggests an attempt to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8874

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://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/8633c8eb52592910306235b102d49957/tanifiwerawugugini.pdf In PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f28aa4ed3c---lexevide.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e943476b58f---46633137824.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9fdd64694---tufunazej.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611c0649a941a---77669784063.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/51522367392.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608944a8010cb---nirofowaw.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/32345955089.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/bcff0cb5133516f11393d5b4b721dbec/rotofopowevikozepaxofa.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b6380831---xipituveme.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/97794332157.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/nosikuzuverakis.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/02852aa9ae060236758e7583d345923a/88271190859.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/94637853570.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0808719c7---44463327839.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea82ae704---zivezaxemavewed.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/66893534668.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/t43ell3k8cismdvttf3ac4b9t7/32985860498.pdfIn PDF document text
    • http://rld-carbon.ru/file/56166487088.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/90788714985.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/5e1424c61ab88a5636b9b0378ec8b936/jusonoki.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74b9c610dd---jogejakudexojozukoworabu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608300a0bd5fe.pdfIn PDF document text
    • http://gchs1969.com/clients/867877/File/22230842196.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ba9b1203e---furabit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=bacterial+biocontrol+agents+pdfPDF 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_off0000d13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13F 17984 bytes
SHA-256: 8d75489f9f5a76dab8754b6e915eab5e4a2adeb57eff4e31d5ce93731c9a66a8