Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c65565018f7c2f6…

MALICIOUS

PDF

84.4 KB Created: 2021-09-03 16:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1a7858db9134e3f25bcb825f22031d7a SHA-1: c932be039ce0f57ac92b5911e6111580816b6e4c SHA-256: 6c65565018f7c2f6e763bb7c17d58d99f6a693ed5a98c3cf546f295eb4bdfe7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e7e348465392df838aed8939001f37b5/kuzagimigerokunaxeburidaf.pdf In PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/b0c58b695dc8a69ffe54a5a4f0820151/tigerebakopumebut.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/83278870280.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/nj19q5sh0pi6jve1777isoopj1/12086095492.pdfIn PDF document text
    • http://www.christianhouseshare.com.au/ckfinder/userfiles/files/weketujijilidagokom.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/kozomemajikebikaza.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/zutisusasenokagifepajunat.pdfIn PDF document text
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/dibakiwaledit.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/64240914110.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3a6e184fb---jeguxijiz.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/9qcu8t28veka5abp46828o61a5/deremim.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/vefidonuxaz.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d95787afad---12169474334.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/81416151381.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8dacbdbd9f---wozobexujidarijikaf.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/75757119394.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/62983946633.pdfIn PDF document text
    • http://sdhmladavozice.cz/userfiles/file/zikiworujewatozazifid.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/tifin.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ho248i174mpsee42on3p61l722/49771925861.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/45207528670.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/e5b6038b4a4443d56ed9992bdde93b7d/mekosotafetutepadok.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/nupepirupezizim.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b013a963197---dolededelowujevirefen.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/dc6f161cff2439ef4d53241df6501007/75288620541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=hp+laserjet+p1102+printer+user+manualPDF 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_off0000e48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 10808 bytes
SHA-256: d7a70c93793af627d2fbf33983a55b6e6bac52a8bcad9f0d831ed4f347cfd46b
font_02_sfnt_off00011591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11591 18112 bytes
SHA-256: b16f3d9862ef5d2561a24a9523210f02c6cb68eac9f63ba04632f74d2ec493d3