Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce35ab1ee0bda22…

MALICIOUS

PDF

86.3 KB Created: 2021-08-12 04:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d4523357c7de7a852b3bc0fa2900dd5 SHA-1: f429e2c34df3669fba0f9775979066a0614298a7 SHA-256: 7ce35ab1ee0bda2222be4796c686d4ce2fb3b0bbe132ca135c27a1effeb4c378
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ede30f6632eb436d3708de2b392dbb1c/45238206194.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071a474701cc---liwezozed.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/32b36547376148b7eb9d21becd980cb6/72831256676.pdf
    • http://hasici-pristroje-eshop.cz/files/file/gugajebixapavanunuve.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c210d59c3dd---sadutir.pdf
    • https://dpengineers.info/admin/userfiles/file/retamumutitoxog.pdf
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/76746873606.pdf
    • https://proektasis.gr/admin/spaw2/uploads/files/81888120352.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bad46f46326---6276890847.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/6afffba0dac594d24374f21cbf990f5a/43776620620.pdf
    • http://abwva.com/uploads/files/zigebetujutajadogavunuga.pdf
    • http://dkkarsin.pl/img/upload/files/85962167983.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/9sh9svm51kq4nqe7daahu3k7h7/35068902660.pdf
    • https://lesfeesdelhetre.fr/upload/files/62277638720.pdf
    • https://yantrasearch.com/ckfinder/userfiles/files/89395856292.pdf
    • http://newgatedesign.com/Images_upload/files/vaxajubepu.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/9748c2031c0e220fd62ed1591e354683/71074200223.pdf
    • http://buchtel1967.com/clients/26382/File/gefedanu.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/0r5k28jebe6hlq7dn018h9aicc/41847347172.pdf
    • http://fixafilm.se/userfiles/file/32717252618.pdf
    • http://veoguidecostarica.com/ci/userfiles/files/vumaxumitanojedikani.pdf
    • http://el-master.ru/userfiles/file/zepigimabed.pdf
    • https://jagamimpi.com/contents//files/78465051954.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=melhores+livros+de+gerenciamento+de+obras
    • 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_off0000eca5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 16792 bytes
font_01_sfnt_off000104b7.bin
60fe7c8f4ccbd8939804cddd966b808ddec5c0315e7ac5bc0df246dbc4a2af38
pdf-font-stream PDF embedded font (sfnt) at offset 0x104B7 18872 bytes
font_02_sfnt_off00013318.bin
b7318d095e5c09ca82ab43416172ebf411ffe571dd9b721c0a5762ff27a78c34
pdf-font-stream PDF embedded font (sfnt) at offset 0x13318 11016 bytes