Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c05c5898cf0127…

MALICIOUS

PDF

78.0 KB Created: 2021-07-31 22:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3c79b4ab3a7a1f685fc2cf59e3d38d44 SHA-1: 5ffd036320848d7d069beefc4e3219399d23ea0a SHA-256: e9c05c5898cf0127062bbc83f147a10106d057344ebe3afc289b15d49c7a2bb7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised CMS upload directories. The primary goal appears to be luring users to malicious sites through a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://kayapaliinsaat.net/file/giseriropalikobatubi.pdf In PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160854f6ad63ac---62763961908.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d03a7656320---virabijebowenemobo.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/weratabimoti.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16092464994b62---57015135690.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/50109648480.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/e3d365f3f1c54dc7e3e1035ae20e0c77/83148250341.pdfIn PDF document text
    • https://ka-base.no/images_content/file/dikamuxapejabudusoni.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/15199b37b6a8e35237d7fee5309d2ae6/dapulak.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/3a1a327560d0d0accc53f305af1c914d/jukowidobemujuteg.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160b30779764eb---wuvuxuvifikov.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/090fb01c33e98131e8f4f42f17bf26d0/deravelijirurodup.pdfIn PDF document text
    • http://guchenes.com/d/files/33232008827.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606eae279f7f4---sogifesewegudapofali.pdfIn PDF document text
    • https://ingmarcomantovani.it/file/bevesufamufuwuroneser.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/f2cfe64c244dfbf77b8ce4d3368d9391/30743906088.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160828113ec323---sirazatiluz.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/31659506955.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/54685297924.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/79837421649.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbae0e7112---punafub.pdfIn PDF document text
    • http://ohstigers66.com/clients/d/da/da15611725e7ba20b6827cbf2e24f87d/File/5783584633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=metodologia+de+la+investigacion+pdf+2020PDF 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_off0000ccc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DE 10996 bytes
SHA-256: 28852a087deab500154a405075732c5fff38ce8abadf75eb1ee5d26578e7744e
font_02_sfnt_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 16672 bytes
SHA-256: 0f6168439e555349f2a831149bd5ca8d88a1ee0ae379f25f5d9bd9d62fc3d888

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