Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e811f242b3bc80…

MALICIOUS

PDF

73.2 KB Created: 2021-09-18 04:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 78289ed94fc43d83f67a4068d0a9f91f SHA-1: d014136969fd5eeae49d3e46f454d5f8e2a50688 SHA-256: 42e811f242b3bc80282c28babe6109472f6bacd875552f25a7fd51003ed8880d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains embedded JavaScript, suggesting an attempt to execute malicious code. The document also features a link farm pointing to compromised WordPress uploads and disposable hosting, indicating a phishing or malware distribution scheme. The embedded JavaScript likely attempts to download and execute a second-stage payload from one of the identified URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://luxesystem.site/js/ckfinder/userfiles/files/27456177440.pdf In PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/psvhvn0jvbacqgd6oto0s4smbr/13099628710.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/guvebelazexa.pdfIn PDF document text
    • http://calisnt.com/uploads/files/42174653050.pdfIn PDF document text
    • http://shopphutungmayphat.com/upload/img/files/40455189494.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/96147921227.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/jalewuzodunogogatotokatu.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/muwijalajunajuruxanezere.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/vawupisazukixikibo.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/nevuzarezupabegilema.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/81976257352.pdfIn PDF document text
    • http://imhang.com/fckeditor/userfiles/image/vetazejisovuvifadutalu.pdfIn PDF document text
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/76743403304.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/69765467963.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf96376d75---18482754594.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b1f835f13---17754741128.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/25728026636.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/waxolu.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210901105902352.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/selaragovaretamelakuwe.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/6e4b3ac302372d4edcdca7e8148c6c5b/xatofovisufewolesefi.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/mavapig.pdfIn PDF document text
    • https://ayurmitra.com/files/file/35844420866.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/bafemewatimudesar.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/8363343369.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/gimopelew.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/rasikidew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=mixed+method+research+design+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_off0000b89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB89E 17400 bytes
SHA-256: ea97de5247b9e5bda730912d8092fabe793f3dbd8ce65e92a4319cbc3b3b5f69
font_01_sfnt_off0000e579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE579 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD90 11116 bytes
SHA-256: 2b2562e361a7a6bfc1e0ac46058cd47f475ac48dfbbdf563c58d35cbb152e2ba

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