Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b362ed6ac1b3c3…

MALICIOUS

PDF

90.4 KB Created: 2021-09-02 00:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6ef02e612f37d6bdab668fc3d901df3d SHA-1: fa0d64330830205d15fe29ce3bfb87d8fc262503 SHA-256: 04b362ed6ac1b3c3ff9d80df631a52604e3dca73fff46918018d747bebc30b4c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs suggest an attempt to redirect users to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/5329fc3b206382bacc75628efe9d7d5c/33463781841.pdf In PDF document text
    • http://likuidart.com/files/ckeditor/files/7140459436.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/bnltgocl1vpncu3tkge1lcue3h/41547786623.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/veramuvixupelojeter.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad1c234350---sofapegijozetixosemidotax.pdfIn PDF document text
    • https://irrisyst.eu/files/file/mulikikizavupomuvot.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36001269162.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/eghob9s2ncvdtnd3q19m2ufv36/63958148217.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/mamomireji.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/95537280752.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d7fa2ed9b59808ae37c9c5f2ca88abb7/15413287370.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-30/20210630224615546541.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/26889173488.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/momidukijekexadura.pdfIn PDF document text
    • http://kokomo1986.com/clients/31029/File/miwiwe.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/71539566269.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/refadazo.pdfIn PDF document text
    • https://isosklo.cz/uploads/73823715356.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/0cfe264c196391c441de659792be567f/xesena.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/65628647320.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/9027e8bf2dd588a5aa8f52cc0e96a5a8/54695723839.pdfIn PDF document text
    • https://bczenekar.hu/files/file/51872026419.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dc7892b88---mapizawevofiborurimusa.pdfIn PDF document text
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca785bd764---vakevokuwisino.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210607231757_Zm9ub2s=.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/79717509531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=d%26d+class+specific+character+sheetsPDF 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_off0000f5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD5 22716 bytes
SHA-256: 3f70c0474716aaffb6666e5bb15886bb7fbc9963a1f8401974efeca289c615da
font_02_sfnt_off00014952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14952 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8

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