Malicious PDF — malware analysis report

Static analysis result for SHA-256 412576c5196744e7…

MALICIOUS

PDF

84.4 KB Created: 2021-06-25 15:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 33ca2984340fc594a21cf1b8012793ee SHA-1: e460d6ff710215db8ebd80b943b0212a0d163387 SHA-256: 412576c5196744e7bc41718c8f5087911d3990bd634ab478d668c73f49659952
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to malicious sites for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://cvsc.co/userfiles/file/88416411175.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/72bee613b8dd68091c37d88a7a8d14c9/riwano.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/45b9e6f012a6fbe1bbf1d28cda3e0c81/gagetorozamunewunipada.pdf
    • http://ifaistos.reality.gr/~triantaf/images/file/mitibinepuloxafenunotuzix.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160760d7f75a9f---4104632590.pdf
    • https://csodamalom.hu/files/files/goradojalev.pdf
    • http://selfmadefilms.nl/userfiles/files/22862364245.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/5444b9be6a2993c341fe7c0bbd208b4c/19962256038.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8741496ebb---sinabatugomusu.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076365db1234---luzemixo.pdf
    • http://shs1977reunion.com/clients/41590/File/64207632097.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2a19959510e534131e718fd0a2a1be22/maxerigabulafudavete.pdf
    • http://oreade-breche.fr/userfiles/file/37444235229.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=is+it+possible+to+see+who+viewed+your+profile+on+instagram
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 16792 bytes
font_01_sfnt_off0000fef9.bin
a4520f57505516bce606b3d678835985180e7d846904d5705676fa2c67075ece		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF9 11400 bytes
font_02_sfnt_off0001194c.bin
46cc65999a3abea30d384efe0fed5b62abd6eabe8c2d74c7278689048f06d3c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1194C 16664 bytes

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