Malicious PDF — malware analysis report

Static analysis result for SHA-256 64dc93bf6e1daa25…

MALICIOUS

PDF

87.9 KB Created: 2021-07-18 20:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 66db364aaa788580be9c08e55d977153 SHA-1: 7dd3ad2a1380af5369e1d2250715e413aa6f7e76 SHA-256: 64dc93bf6e1daa256d3620ce8dc51be354d21ff86dc3af4b125d7b0f1c49083a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which appear to be compromised CMS uploads. This structure suggests a link farm designed to obscure the ultimate destination, likely a phishing page or malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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
  • 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 http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160884247b7f48---nemovokubuvibowivamop.pdf In PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/8cc93ecc4359cc39e326903977d300e3/80488163099.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de7abbec45---77640570404.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/62582995665.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/19367075742.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/5ca603b64c18eb43397342e237add649/94499301309.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/daduz.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/42aeaa341a0560a9520bdf00ddadaa55/lutopegumemiwulune.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/g2fr1q9j2o8amugm2imcj5elh0/mefiloferomub.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aff3ac7d97e---93832214556.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dbb32a433---58977787702.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c13b1ab834a---fipavofetopuk.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/vakabogagitorixowud.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/56e44d2f786b3598c06fbc176afe3fcf/74236958766.pdfIn PDF document text
    • https://digicpictures.com/downloads/resejufip.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/duzexesosoguvuvedisesa.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/77cdda856c79702b73ab98963a86b459/51565495147.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/2769589919.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/oug4sgra8bh5d8utaonh279b2j/2243459006.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f97cd9f930---29328102036.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817876be480---vikonowe.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/vivavedemotobaralepop.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/jeguxufajotawu.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/740d9d18d50025daa7a9bc6b52d772e3/29542273652.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/vu41g0c2r9blfus9dealiunopk/30155764070.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=pleasantville+analysis+worksheet+answersPDF link annotation
    • 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_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 10564 bytes
SHA-256: 41ba778555c61f72b508f2e47f0d7f74b4dae50aff447ae516705663693d893d
font_01_sfnt_off00010e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E69 16868 bytes
SHA-256: bc8cab9ea4ad6d30c8783c872f3fd00d1144b225123a64d84be2daa01bb43306
font_02_sfnt_off00013a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1