Malicious PDF — malware analysis report

Static analysis result for SHA-256 6061c748a02d9e3e…

MALICIOUS

PDF

77.9 KB Created: 2021-07-16 07:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0596b6c58d3686eb82804c122d229206 SHA-1: 0df2a45771f233f54a51d7fb6749fcfbbacf7727 SHA-256: 6061c748a02d9e3e063fe80acf393a8c4fff7f8115cbb034305bf1c3e3258d4b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of compromised CMS upload directories reinforce the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/85c8f2e1ed0dfef0a512640360cb4590/konelo.pdf In PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5777775185---68170968631.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/44491908756.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/34284816813.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/94f6b2dd673fe442b5f9e83d4e8e17fe/worapeliginokitaregap.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/97114752583.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160813c8fe2110---zezagabupivagelosilalewaf.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/mawesaxusejuko.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863117a44f4---64118744117.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4990af47eb972fb93db6d5b589d78d1a/56551362881.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2e4811ab59cee92c6e2c271b08eed084/lizawapegari.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/47126864239.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/8af066b4144a6d9a1b6aaf10379d9485/fodepegeselalu.pdfIn PDF document text
    • http://kotolantopeni.cz/file/98683270122.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/9c574c6fcc76eef647db855e58054492/64522827981.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/xudanapejul.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/d8f954f191d82ea7a5e3fb63b18f339e/senagonadamobusi.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/89220140691.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/01d9eb12b86000bd55ba6e77ecd8546b/babusomova.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/7vktijrj7t4q56mgv9deo3v3u2/52720086913.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/tgkmqu6ts0qm4o67hn6jiqhegp/93350621665.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/76304991278.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/naguvabopilutumizaduruvit.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e182a455a---gefabinukuselunegeno.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/juninaxixewizeziveri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+many+playing+cards+are+there+in+a+packPDF 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_off0000cdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD7 11244 bytes
SHA-256: b8c1ba27ba4d3907a4a86c0f73463b194d59e836438d70e5a3eadb1b4eb8ce46
font_01_sfnt_off0000e7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 16196 bytes
SHA-256: 30d7a5eed9028f63159f50758c8a601b0656e4d021a1d5d35bfa4f8eb75ddee3
font_02_sfnt_off000111bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1