Malicious PDF — malware analysis report

Static analysis result for SHA-256 764043360ec9ac3e…

MALICIOUS

PDF

83.9 KB Created: 2021-07-16 14:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6890206360b0af6156c15cea3413089b SHA-1: ed5451d35f665458a64c3fb28103c352c05e2914 SHA-256: 764043360ec9ac3e6a9523038f5c3a0acda5f3164abddc5cc21f127f1eb333d7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be redirecting users to potentially malicious sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://creativeindustries.ru/uploads/userfiles/file/18878417070.pdf In PDF document text
    • http://seamacros.com/upload/file/70332489457.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/76201481868.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d21382afc6---jotilarejovogexawoxedilo.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4fdf18735---ravirufad.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbadce7db90---wamizaven.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/42867154924.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/1nl1m3hhuvug8j5vhtn84uf4d1/xugikusezosoguxamukeg.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/gukupiz.pdfIn PDF document text
    • http://birminghamseaholmclass63.com/clients/75362/File/24155712602.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a06e4a61ed---xuxebidimupufevo.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/85472180813.pdfIn PDF document text
    • https://beaszemin.com/files/8685175088.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/fokidinenabifawenitideror.pdfIn PDF document text
    • https://vieclamhanoi247.com/upload/files/61690056985.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210618234717578.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/djmifinl7ig7ule99dsrg9bco8/25672868855.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/4543ac9e00e73dc9079aa26bd83d512f/36653739099.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160901040ef11c---52218667248.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/ki995j780tlgvujk4ppr5i3r9r/90053830479.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/xitifexunosib.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f05020416ff---23983471272.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/mowalana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=ucs+algorithm+in+artificial+intelligencePDF 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_off0000e3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CF 17208 bytes
SHA-256: 2f02fb5191643e7425f6d6f0865c63d291df26a17e63abad70e4f919eeb5c0ae
font_01_sfnt_off00011125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001293c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293C 10788 bytes
SHA-256: 5f3b2bc5289cacb3e79261431b55a9ece5f8533a5e71a611d8792ef4fea714ca

Open this report in the interactive analyzer, or submit your own file for analysis.