Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96e906d0c1831af…

MALICIOUS

PDF

76.9 KB Created: 2021-09-25 17:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 093296691f78fe557f9a0d2af23b8d1a SHA-1: 26c9f9d2b09e54a7aa8db69f1e4726a166bf4cf9 SHA-256: e96e906d0c1831af9e7685f304936b409c2e5964ac730c3b44bca2e4cf420240
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites used for hosting. The heuristic firings indicate this is a link farm designed to redirect users, consistent with phishing or malware distribution tactics. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://nomylo.ru/uplcv?utm_term=smart+home+launcher PDF link annotation
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161307039410a4---32190968558.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/jarus.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/wuxaxopubuxumulofadijik.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/xufexewipekogaru.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/nifesuwatokugetuvi.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/turaruzokiwutovinus.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c352a1ea1e---73472955678.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/57397777048.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/gatemabivoxodiwogani.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302ef8374bf---94775861730.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210914140914.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/78628067183.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/jilewogodosebimibuv.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147d0bc49d04---70371124153.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/mexage.pdfIn PDF document text
    • http://rentaruedas.com/files/others/94195125360.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/zobujuwot.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/95181256680.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/bomezaneranodowol.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/33785650594.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/sogel.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/tedenifu.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/11147176298.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC487 10412 bytes
SHA-256: dd082638edd51dc5f2175c97b714a6dd2c7ee88c284c40b5ed33f7d192848ba5
font_01_sfnt_off0000dbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF0 19464 bytes
SHA-256: 2c99c346a51b6a02defb1894bf980787bebc99aa66d1052e2f1df0664bfdd39b
font_02_sfnt_off00010e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1