Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb90e568817cad5…

MALICIOUS

PDF

72.0 KB Created: 2021-09-17 03:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 809a32822bc4c99d4cb39ed82cdc0591 SHA-1: d080c70599091d6fb882d89e990bad089306b4f8 SHA-256: ddb90e568817cad51f81442178270c61729acb6ba8feb2a0df44bc30088f2fc4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and heuristic firings indicate this PDF is designed to lure users to malicious content, likely for phishing or to download further malware. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4060

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://smidgel.ru/uplcv?utm_term=sonic+scene+creator+v5 PDF link annotation
    • http://sdes.in/uploads/31616894328.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16140ca585b040---xepanoderenedarefi.pdfIn PDF document text
    • https://maturana.cl/upload/file/588170501.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/sijisafulozemitod.pdfIn PDF document text
    • https://gilbertems.com/videos/file/buwewulo.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/vuzizonoxomoribe.pdfIn PDF document text
    • http://tiquital.com/documentos/file/99083023451.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/26968635283.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/tujomewotewilokigeluxufe.pdfIn PDF document text
    • https://wecareprogram.org/images/file/4699020810.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/vibanatefarosepinilaluz.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/mimadubunodogelazesebab.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/kanobowajinefem.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/54a8811d7cde6e7499eec91f8403b4f5/87863207224.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/wirepaxuwo.pdfIn PDF document text
    • http://signauction.net/userfiles/file/86710440179.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0fc37d5bb---timunivevus.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/nobudusijujivaxirob.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/gadekolimodine.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/ffe2f842f699651713d50c9d4dfaf159/29468118574.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/60289473543.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/vajuxijekenimitum.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/58220038798.pdfIn PDF document text
    • http://klemanpince.hu/files/file/sumabitilafowebugaji.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/jazajixotok.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_off0000c791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC791 18388 bytes
SHA-256: 40e4a2ef8cf5562cdf81aa6471d5ecaa399beb263fa6f6ab12d083dbe187df71
font_01_sfnt_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 10452 bytes
SHA-256: 9b761dc870b96af6a8cdd07acc6798260b30e14086b835b398f7d9ed30b90b46

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