Malicious PDF — malware analysis report

Static analysis result for SHA-256 025aa413d002bb80…

MALICIOUS

PDF

82.1 KB Created: 2021-09-02 21:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 23d2ae4d7361348af10f741e16b45a8a SHA-1: 82fd2267bcfbdde2bb53bdfc9bbc6a7a98ce1157 SHA-256: 025aa413d002bb8087b4ba4cc6d9a7a1f2cd6c24249d974a4c6b556797d805bb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. This suggests the PDF's primary purpose is to redirect users to external sites, likely for phishing or to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=geometric+progression+gcse+worksheet PDF link annotation
    • http://mwflower.com/upimagesfile///tusefezutokag.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/78a7d4cecc0274b68e40389f2668b135/retagisetowunosoku.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/45073412659.pdfIn PDF document text
    • https://superpart.com/files/wajebifagulologibavupos.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/doxatolidexopivujuzur.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/72960625651.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae03c657455---8380694883.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/zabaxowefonaperejiziruw.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3a0e78aef---poxipuxuvuzelud.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160760e9d17e68---lamenazibumanamadipobi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798880006ae---88868221991.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/tolemazutujudoj.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8398666b52c25a777cfc630f7fc9657c/90858714468.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/52399989330.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0794ccc65f246221c2f408ae312b765c/20641018696.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/6331fdec20bcc2805b5da6f136bd5165/lowerigobebakuzisuminukuj.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/dotobedaruzuvub.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/66ce5d0af1e6d6bca187b01e49b83c49/27448328776.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607928e4aa850---pakimibotefavatapapejo.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a451a34ea03---gigolavijagom.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/jujapojomudi.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/8b46fb901a5b25404df5fceb3a0e05a2/42278202874.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/vositexibazumu.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_off0000d7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F5 10828 bytes
SHA-256: 96d4689e7ea3078427084cdebca501c2038366c8e46bceafff46b70b82a69090
font_01_sfnt_off0000f0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D5 19008 bytes
SHA-256: 088743d634199048eac9d297067f0fd7f67d576674ee0f29718d36a64c412eec
font_02_sfnt_off00012299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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