Malicious PDF — malware analysis report

Static analysis result for SHA-256 92852af260a215d9…

MALICIOUS

PDF

96.5 KB Created: 2021-09-17 04:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0d9351d9ffbf61e18cc76d76d3346eb4 SHA-1: b04ba57092c89a58ae6c0b45321c0dc237a2d868 SHA-256: 92852af260a215d99b434f84db0dd511adee7e49bfb1251189ae048fe158dce6
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of JavaScript and numerous embedded URLs, many pointing to compromised or disposable hosting, suggests the document is designed to redirect users to malicious sites. The ClamAV detection name 'Pdf.Phishing.Trojan' further supports a phishing or trojan distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8126

Heuristics 6

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=example+of+engineering+and+scientific+software PDF link annotation
    • http://noxsun.com/jingkelun/userfiles/files/20210906225656.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/rajibukewapezopinezoxe.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f679e6c055---fozomafisukozilali.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140beb157c86---82589927939.pdfIn PDF document text
    • http://print-resource.co.uk/ckfinder/userfiles/files/36884996755.pdfIn PDF document text
    • https://www.informacion-indoorclub.com/boletines/img/file/baxorawotivegudela.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/22255416460.pdfIn PDF document text
    • http://micruts.org/userfiles/file/nelovikugofaki.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/48469331325.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614051271e2a9---70723951794.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/55061126052.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/dawogariniwir.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/lukagesuromutixus.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/taduwopuzupon.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/88353759075.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/17403957720.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/130048292030.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/vagimuwelovegese.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/92904436779.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/63686977320.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd205b6ec8---24135861817.pdfIn PDF document text
    • http://metall-press.ru/files/bifelu.pdfIn PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/15620374286.pdfIn PDF document text
    • https://rt9.rspo.org/ckfinder/userfiles/files/76540277564.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_off00013fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000157f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F0 18660 bytes
SHA-256: e6041fba26da5c2afc7817bb778a5a63b55a90c39673957c842c18ceefcd2156