Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac80517d377e5c4…

MALICIOUS

PDF

84.3 KB Created: 2021-09-16 04:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 63e4331b5ba84d7e68e01edcffbe933b SHA-1: c7a8749c75454b8468057cb8095ffb1d9e91bfe7 SHA-256: cac80517d377e5c42b67ecc91b394ed92b6fa62d6efa10d885f498a9bc05d69b
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, suggesting an attempt to trick the user into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent, with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supporting the lure mechanism. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://toonesk.com/upload/15893062105.pdf In PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16131cdfe0261a---8168416990.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vogenibosejetelewi.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/vabunikovuzifutake.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/48374455742.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313fea1abb7---51381134413.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/55492919177.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1316c7c56---rezitaxuzadeniwutofip.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///11398919938.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/saluwebanemozov.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/35527550309.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/88936813852.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/guvulufef.pdfIn PDF document text
    • https://wildnaturetravel.com/File/suzuralorupibu.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/galiwitaxomonewijag.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/viwekudas.pdfIn PDF document text
    • http://uniontsg96.ru/admin/ckfinder/userfiles/files/wajigutimup.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/xawekek.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/mitazevidagilibewikuvara.pdfIn PDF document text
    • https://woft-dining.com/webroot/editor-uploads/files/vegewegiloxajavupijin.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/bexotiborowupe.pdfIn PDF document text
    • http://freetds.net/userfiles/file/25225167173.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/72664287985.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=raja+hindustani+full+movie+watch+onlinePDF 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_off0000e30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 11068 bytes
SHA-256: 79597118f5396fe5e067357a42a7992aef01fea99bad966f2b79acb1722bc9e1
font_01_sfnt_off0000fcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C3 18016 bytes
SHA-256: c92c1d23c6cf9d06158d1e74c29c2cbe9b3890ee162acfa54fcc9794cc7ac371

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