Malicious PDF — malware analysis report

Static analysis result for SHA-256 84bde65ad19bc371…

MALICIOUS

PDF

77.8 KB Created: 2021-09-15 12:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 35c8f2d484bc3e0ab613a19b0bc42310 SHA-1: 21ea548654896ea1c56e1031ef87a098bfa3f06b SHA-256: 84bde65ad19bc371397de21f249a49e684b2d0849b1a93cf2b77022105ac2f67
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/uplcv?utm_term=best+free+porn+game+app PDF link annotation
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210906153744.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/14315087068.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/cntkhr9bdaqgf64pvbuqj4gb49/22845679794.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/cuiguagokj6ua3jami1h4ddpvs/murukuwuzuluxafotomugi.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/2021932328374667.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/1a19e1850eaea47a9bd4f7571cc6b44b/98203911619.pdfIn PDF document text
    • https://chptravel.ir/data/file/90078646954.pdfIn PDF document text
    • http://gibisch.info/files/files/zozewubaviz.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/12168422324.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/c48c0454ded53fc9fd8a419b0a4ed69c/83533412363.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/87351270691.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/57577009226.pdfIn PDF document text
    • http://gro-felix.si/uploads/jixolonoxam.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021091007470873499.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/72774308067.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161385f807ab47---mexesovoduxako.pdfIn PDF document text
    • http://jafra-com.at/userfiles/file/jimisadi.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/sogemobi.pdfIn PDF document text
    • http://maimungkorn.com/UserFiles/file/73996683779.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/3248697587.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161380e676e7a5---40096081031.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/vugopenusubowofukir.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/74814957912.pdfIn PDF document text
    • 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_off0000cb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2A 10616 bytes
SHA-256: 8c8b1f8bbf367ce0a0fdc47a6939625fa2677631a9c12a04aeb0063fed47aa1a
font_01_sfnt_off0000e37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 17660 bytes
SHA-256: f64d6ae1314193b4879104a350e1fff11daa92061da39974780ca95ec155b89b

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