Malicious PDF — malware analysis report

Static analysis result for SHA-256 2423b25fd61cea9a…

MALICIOUS

PDF

89.3 KB Created: 2021-06-29 11:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b4ffe66355f43fc75246137ab1cd7a2b SHA-1: 6cdfa25780191cc35c03f5ad749527ea0619ac0d SHA-256: 2423b25fd61cea9a7902ad5109eab2b4d4606930b67aa6216072afe4b194e117
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to external, potentially malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://weblative.com/wp-content/plugins/super-forms/uploads/php/files/0d8cun4c29955nhd0kfvc57mg3/lugofumelasalataket.pdf In PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/jobofiboposiguvexuve.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/mu26tj2rcp3imd445rvj0oh723/jozadaf.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/e21fadaa81592d8511b76bdd10583ed7/93469429476.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/c82ab0da2a7ee7b5cbf2e5efdf127c9e/xitubatitumabimekum.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/77784045609.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/muredolubowox.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/zenulo.pdfIn PDF document text
    • https://cupanghitam.com/contents//files/8998342766.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/ff5162aa22e9fb4076e77e908af71839/12226609205.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d16b632fd---24284575055.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/rifubudolagevujoxujizozas.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/logonuvizumimitubetitojiw.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdfd6f2fab---rabamixi.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/qm7pse41tlen2fsh839ueet6aq/zapanositefesomoj.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/29579332914.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ldjukdsco1bcq7cmflfeoa7vn6/91878664099.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb41049d60---xavager.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/64015454886.pdfIn PDF document text
    • https://pcstaiwan.com/ckfinder/userfiles/files/xonavosiji.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/15608835883.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=lyrics+sometimes+you+have+to+encourage+yourselfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11154 11020 bytes
SHA-256: fa52e668e41da0cc92ec10e76883adf9ca213b0d94485e4d1de2f624f6347535
font_02_sfnt_off00012adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADB 17356 bytes
SHA-256: 6baba7938796ea517a7c68da7dbf9da03b72e42a30d833df001615447a467630

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