Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d160f7269d245d…

MALICIOUS

PDF

79.7 KB Created: 2021-09-04 10:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 827456bc29c80266797a995cc96a2415 SHA-1: 0c2b95311940d17ad674ee8c76c8e6e1c1ba9550 SHA-256: 94d160f7269d245d2a65bb21aa8cb29253085c1ee1d1d99a81a978f03ece4842
196 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious files. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to execute commands, a common tactic for downloading and running secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f50eebeaa6---9190767173.pdf In PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f09cefb6---44114116388.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07da17f50f---19843032831.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/lopezifezoperos.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d925b63a3---64636185315.pdfIn PDF document text
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/nelifiboxajegura.pdfIn PDF document text
    • http://stattus.com/assets/file/raxibopo.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/68699161296.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/wexikesiwixafuzikilaj.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/rewuwitamuto.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/53069631021.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/c388e0eddb4708544af32063791f3700/69934882396.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/noroketaj.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b231c2e8887---38473634491.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/rewogaxukizenonu.pdfIn PDF document text
    • https://irrisyst.eu/files/file/2997512091.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/ripanaxuvigamevulavi.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/58928309433.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4d6e73ec8---77213684164.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/jowulelezegixejika.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/tizanevefinab.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/17526255847.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=catalogue+ikea+2012+france+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_off0000cf2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE744 11144 bytes
SHA-256: fbc4efdeebe3c4674473887d47ccd3fb83642b2d1646df2b1501405d7a8d3cdb
font_02_sfnt_off00010150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 18344 bytes
SHA-256: cee4be13504cabe27ab2e8b9ba7439ec0239d1f30d648cdb4803865ad57c7e8a

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