Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9be881b9158f74…

MALICIOUS

PDF

81.8 KB Created: 2021-09-09 10:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: adab87db4552090aa2b39d72b9445327 SHA-1: 09dd791e9283e998321e34d5a85d991820742ac3 SHA-256: 5b9be881b9158f7445d5cf2125ab4b624621bc09c60d817cd75e01078e5e633c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to disposable domains or compromised WordPress upload storage, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive use of external links is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier clean score 0.1831

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 https://garglob.ru/uplcv?utm_term=dragon+ball+super+broly+full+movie+in+english PDF link annotation
    • https://stancijanegrin.com/UserFiles/files/kejafegukeromafa.pdfIn PDF document text
    • http://3q1p.com/upload/file/210902053458699501b88n38m77gja.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/6223880663.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/tawawomumanivotode.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/riwaroroxis.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613459a4b9b75---72492663544.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/vadomopew.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/31718123876.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/wedurepo.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613530a74d9e0---22743467047.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/92521460454.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/1956957351.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/foluvirevelogonumori.pdfIn PDF document text
    • http://maxbrio.kr/files/files/71624894975.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/26081793593.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/36938339789.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/11497597992.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/ae7b26a039f44df867676bb07ff1c443/61749800784.pdfIn PDF document text
    • http://ustunongel.com/image/files/nujibimi.pdfIn PDF document text
    • https://xcheck.vn/uploads/userfiles/file/masisejaga.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/nemuxavuzuxi.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/bewugosogidibe.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/vufiv.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/84997480377.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/paxenita.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/948702f8826feafc1cdc7d7b5ac7947c/99136533617.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 19756 bytes
SHA-256: 4969d293c4769bfe83e7df9847969f1d68b7d3880df8e7b2980d05bd11302b8d
font_01_sfnt_off00012782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12782 11128 bytes
SHA-256: 597f3bd57bba004e5a59c6858b176f3ecdfbfc4b104ec2b18ac4dd51f4cc9ea7