Malicious PDF — malware analysis report

Static analysis result for SHA-256 87262c8d73583d3e…

MALICIOUS

PDF

78.3 KB Created: 2021-08-25 07:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bf7bf28a3b2b6efaeefced920f68df52 SHA-1: 42d92b0030fc4a82dca2551e529d257c34da9514 SHA-256: 87262c8d73583d3e8b81ab4ab3d3e0f3b928fd087b6b735edc78709b55967a26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a significant number of embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mamo-tato.ro/userfiles/file/sabelawarewusawa.pdf In PDF document text
    • https://baptistfriends.org/media/54861514117.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b79ea2dd90---zizazogabadijenafotonunow.pdfIn PDF document text
    • https://msiutilities.net/documents/1395645260.pdfIn PDF document text
    • http://hillhouseclassof1961.com/clients/c/c9/c9b049383fb65e98d0a4dcab6c176392/File/90355738655.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fdfe488a9---kejupuxezovobezaguvis.pdfIn PDF document text
    • http://fittbikese.hu/files/file/rufimazobujofumasivem.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/29842187495.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/gepizufata.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/mekuzegulidebasod.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/demogakilajakaz.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/18304600336.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d0663bd4ebc42aca1f5d1ad94be4587/fisufeniroxasilufo.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce761a4a45---laxebeluvumijimulepoteb.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609842e3bb415---42638114088.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc24964495---nojuma.pdfIn PDF document text
    • http://www.christianhouseshare.com.au/ckfinder/userfiles/files/kimozapube.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/lulebil.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/bilajeruxaxaweje.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/23787239099.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/popituvujagafewilev.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/df3a63c34ffc182445d0b6b44c8a2303/89232644688.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=thermal+and+automobile+engineering+book+pdfPDF 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_off0000cecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E6 11072 bytes
SHA-256: e8db3437543175968f44bc173edb8f13ee8272ce8607227a8c66432cc8be2f98
font_02_sfnt_off0000fffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFC 16564 bytes
SHA-256: 3aed90ddcf26f26daded5306d417bcd5f6e51a91c6ec2e1ec42777584e3e7b37

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