Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee66eed99f2de5d…

MALICIOUS

PDF

95.7 KB Created: 2021-10-05 10:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c170948c2f30368c4def41b00d6e947b SHA-1: 8cff44546bb31e0c4cc378cfa18bcb5fa3ae38c4 SHA-256: eee66eed99f2de5dec42dc5ebb86748c3aa3e536abae86e93e4abd63bb62753c
124 Risk Score

Malware Insights

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

The file is identified as a PDF containing a link farm, with multiple heuristics indicating it points to compromised CMS uploads and disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The embedded URLs are likely used to lure victims into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.2122

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://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6d6d15467---88281296861.pdf In PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/zizeva.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf68a55d21---voxixalewigofiwovuj.pdfIn PDF document text
    • https://togeltop.net/contents/files/vubewubuj.pdfIn PDF document text
    • http://alltechsro.cz/files/jizadunowakodefoxeze.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/98050729848.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155b731a0f16---xogutigudilojazojiduv.pdfIn PDF document text
    • http://metallpress.info/files/gagemalawoxinuditinut.pdfIn PDF document text
    • https://artgreen.vn/attachment/files/kuzavonunanifexoked.pdfIn PDF document text
    • http://boldogelet.hu/media/tiwedowixe.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/riwisixub.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/64489516793.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/fisixobokeru.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/1057525351.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/14592313423.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/65583723333.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/77697749119.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/22978777870.pdfIn PDF document text
    • http://wingtsunkungfu.ro/imagini_ws/makisizemedipaniliden.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/40280000685.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/21207000545.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1615858d7bfecb---8115412029.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/zoxagewumosolaga.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/dedukizimujop.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/vaxelodax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=absurdity+meaning+in+tamilPDF 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_off00012204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12204 23912 bytes
SHA-256: bbcfb679ebe2efaaf6ed9599fca348b61cdbd4cb258979868b56592935a3a02b
font_01_sfnt_off00016023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16023 10804 bytes
SHA-256: 89bd1e197d9b621e9dd6547bb07dc049629b60f8700d419f8750f47f3a115680