Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d3cda2d6fcd9ff…

MALICIOUS

PDF

84.8 KB Created: 2021-07-08 20:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0c7280c803bf7ea9c691364224e9b9ea SHA-1: 9cb67b692363eb4859dec6ac575ccdffa591f9a1 SHA-256: c0d3cda2d6fcd9ff79a1f74abce9024c70583cd957fff67743a6c3bde83db3e4
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations. This structure suggests the document is designed to act as a link farm, likely to distribute phishing content or further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e2f836ade---78658030463.pdf In PDF document text
    • http://bbu.vn/Images_upload/files/22757414972.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/49744989837.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc689bf804---42884156447.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/61h7ejh6r7lvqsju32k3in0usm/lotojewepezafegofar.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0e1ff3509---45108157158.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/96102371660a355e34bb0f.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/203502460360ac94fad2af2.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/tifopazumigosux.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/pumivupeli.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/16190917697.pdfIn PDF document text
    • https://turbooto.vn/upload/files/49590448470.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/6dbffe404971c1a98f7b946a51c6726b/vosomexiribu.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18bc3cec33---pibesazelokusofuduvexasi.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/xuzimiwivozonupotis.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/rep6fd4vni89e6qhgirgnj278anl8nd8/45936179505.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/554a37802d2d2ff7a05eda6b85503172/94844978780.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/totez.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c71525c6933---fusakorenejexunoxolo.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/de1984d00dd7c92e14ee6e02fa8d0a1f/33383679344.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b88959a2f---43445172965.pdfIn PDF document text
    • https://lesura.net/userfiles/file/zuvewupavuga.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a090c57f479---naviguzizalenoboxumaguk.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/52480020529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=beethoven+fur+elise+piano+notes+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_off0000de8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8D 21616 bytes
SHA-256: d102d6e360a116a77efcd0ec121f4357f96ee4afff02465c477dd783b6d9b63e
font_01_sfnt_off00011329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11329 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B40 10816 bytes
SHA-256: bc6bdcab641bbe05a99b196aa38c1908b2fde94e7272a90d05423a64a185f73b

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