Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d13cca83edcafa…

MALICIOUS

PDF

81.1 KB Created: 2021-07-26 08:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 753a40a5a912b61c069c49b564f592e8 SHA-1: 885c244d83725a7bf3a81f6caeef41170e814d20 SHA-256: 34d13cca83edcafa851d7c57648a58646f40746b4e7f9d408be5728104bd11d2
154 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers flagged it as malicious. It contains a link farm pointing to multiple domains, including compromised CMS upload storage, suggesting an attempt to redirect users to malicious content. The PDF's structure and numerous external links indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9085

Heuristics 5

  • 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
  • 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://nacyc.jp/Upload/file/purejijogilupafi.pdf In PDF document text
    • https://maintogelonline.info/contents//files/9162903404.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/xonabakeborinemodab.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/fdhid0vtqrqpjdal1c8poadll6/magijibonoparipox.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086aba8961db---koruxakadagumedot.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/54112154891.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/f0rahdk3dlg0l0hjj2q1fl2o93/6525712449.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a354ab36d4c---dalawumetekarosozulilev.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/13933961790.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/6684033647.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/8oa7vaidovvc7lev56fhbetrg8/zugoniwurivowuligadibove.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/46hao97ugcaip4qaej1js63kfu/surumifiwuxusesifurebunim.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/40410240403.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/bokolamir.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-18/20210518182335391220.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/gixagu.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826648c6d17---88072515438.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/mujapurorisototof.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/gosebo.pdfIn PDF document text
    • https://daismene.it/file/22988820619.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/71329756988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=greek+mythology+worksheet+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CC 10920 bytes
SHA-256: 731c56aab79e042221bab7fc7688c6914884c86d256bf72eef8f372486bfda26

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