Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e1e2befc643345…

MALICIOUS

PDF

64.0 KB Created: 2021-09-24 08:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0b90ff3cab09788e9ef7e4ca926bdbf1 SHA-1: 386f240de9772cf900174ac04e3f4eae63f2d1db SHA-256: 19e1e2befc64334572793b5234505dee09de390a0954bf489cc08b434aa78d10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for a phishing trojan. It contains a link farm pointing to numerous compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded URLs, such as 'https://krisoc.ru/uplcv?utm_term=android+bootloader+unlock+tool', are likely used to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8566

Heuristics 5

  • 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.
  • 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 https://krisoc.ru/uplcv?utm_term=android+bootloader+unlock+tool PDF link annotation
    • http://daechienglishpark.com/ckfinder/userfiles/files/6119856364.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/161430b303faf4---65008768890.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/bewavobobovijokukamiba.pdfIn PDF document text
    • http://zlhk.ru/upload_picture/file/dixovuvapiwituramopikegak.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/51280590350.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/83084002849.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/26841464117.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/74983532699.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/pizijijuduvisixuko.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/sosovasozoj.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/filesogavijisamoj.pdfIn PDF document text
    • http://cobmedia.hu/include/42188538643.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/83452270521.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/23750545641.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/95606112252.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/34519067819.pdfIn PDF document text
    • http://hydrem.ru/images/file/folefopijagireromafufe.pdfIn PDF document text
    • http://le383.com/uploads/files/zedunemusafuxaforevo.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/21630660960.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210907_230547.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/37417579722.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/zoporedigoxi.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/bafeji.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/nureb.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/b95dd9cf5adacf5183c49d89b4960556/97936563303.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0de9d5a01---fefunumavixugumefuk.pdfIn PDF document text
    • 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_off0000daa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA5 10508 bytes
SHA-256: 05a8b44dc0ef486517ecebff8858d1b05d8349a58f1880d2470ca12c0065109f

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