Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f56ffa0580c67a8…

MALICIOUS

PDF

84.4 KB Created: 2021-09-08 02:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8189423aef9a34b855b20f37da1e29f7 SHA-1: 645d33eaeec6d26b716422fa73e0a0e245fbb0d8 SHA-256: 0f56ffa0580c67a865a6db571a793714be12a70f1da487160d0dc82e28571419
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external websites, many hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for initiating the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/3e052c36205eb79e8f63edc7011f4f7a/71973318653.pdf In PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608409a203d7d---riropufodamezirajadifo.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/nesidupuji.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/tubapobexa.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202108201923305542.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160feaf3a7c06c---19409318819.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/34565487336.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/42628584567.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a67faab2855---fikulemidalarizavavofugu.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/tuwolo.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16107a0b9925d7---35175232519.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/ruduluxofunesupek.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/bdc58348b3b7d8427c4b7b24927b00eb/vubalerasufovum.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/10876558531.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/kagexoloxaradofabidisoto.pdfIn PDF document text
    • https://x-software.cz/data/file/vesisuvizomitu.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/33248505771.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/58297559905.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/15483011513.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/91270467918.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/26451478348.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f14679acb19---68482968037.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/1797723fb99a5f28c8895baffee25bc8/97426463864.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/tetupol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=grocery+list+pdfPDF 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_off0000e696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE696 17608 bytes
SHA-256: 451918f2bcddb7bdd4a58f994457d3aa0a2328cf7e0bef24ec16436ec9b5e7c4
font_01_sfnt_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 10500 bytes
SHA-256: 7948a6f3b5b900a86354fa1e76288416ea7b99a894e7821abb2ecd8fb0481978
font_02_sfnt_off00012be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1