Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9ae8968a0a28a2…

MALICIOUS

PDF

94.3 KB Created: 2021-06-30 13:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56090e7a3ba7731196093fcc0f792e78 SHA-1: 5366a50bb6d568610b1d0f401151313125e2ee35 SHA-256: 9d9ae8968a0a28a2c3ff741a8a095c33f57d55eb448c8ca7a490d72eb9a360ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm used for SEO manipulation or to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to direct users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/9e8b7d67c719f658d7e80173a6162aef/vumosaweniga.pdf
    • http://taxilitomerice.cz/ckfinder/userfiles/files/kivegovowobav.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/hlad4nip8g8mq3k167dl98djaa/28353389638.pdf
    • http://aelma.com/sites/default/userfiles/file/15570232049.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/b22a32aeaaa71ba7fe894f86101ff8a5/50354295840.pdf
    • http://kapli74.ru/upload_picture/35623048731.pdf
    • http://orikon.net/Images_upload/files/78775103879.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609491cb2eff6---zofaganovojanegesilukodo.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609761475af34---botajidam.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072766f4abdd---71717985387.pdf
    • https://podereilmontaleo.it/writable/public/userfiles/file/xogepasigokaxixawipi.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac540c929d5---gineluxafaverif.pdf
    • http://ziconiavip.com/uploadfck/file/tidejowod.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74c1ece14f---vagevaboditafof.pdf
    • http://podiummoda.ru/userfiles/file/28036855447.pdf
    • http://cdkkck.com/uploadfile/file/20210524144410.pdf
    • http://bezagsecurity.cz/userfiles/87921824949.pdf
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/41192935382.pdf
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/43345352571.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/f4c24984efaf49b8b613079bfbddc0db/87441126438.pdf
    • http://nktrading.qa/file/files/63627488760.pdf
    • http://box8websites.com/ckfinder/userfiles/files/56864561165.pdf
    • http://iqlacpro.vn/emotive/upload/files/29382484900.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b548cd88066f872a1b82264f3f2312b8/42087905224.pdf
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99192412863.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608402d2a01ff---28939399561.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc841c5ab7---zasudilijemewujo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ncert+solutions+for+class+10+english+first+flight+chapter+2
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cc7.bin
b8b5b674669b9b061be3eee416e57beb51a5d86baa072c9f7ffe52e8c820be09
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 17096 bytes
font_01_sfnt_off000138fe.bin
eded29e4e86588bddc56033d967bb05dea004eee8770c252861987981ffc53b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x138FE 11128 bytes
font_02_sfnt_off00015304.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15304 16792 bytes