Malicious PDF — malware analysis report

Static analysis result for SHA-256 13472409c22b7cd3…

MALICIOUS

PDF

91.8 KB Created: 2021-09-08 05:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 243271743ae09869cdd4c26071bdd57b SHA-1: 01cbb2d65a107f6a914fc44b81c6c99959c4b194 SHA-256: 13472409c22b7cd3a71d1e4eecbac231a41ae7706ca1c516e1fcd53217582857
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised CMS uploads and disposable hosting, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • 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://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2346926301.pdf In PDF document text
    • https://norservis.com/files/files/tiwibepezewuririle.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/jitogipazakixewubapob.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/76242840611.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/a6655a9380df9681dea4aaba8e26359f/roxujuxukugaforumuposip.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607991f30d0d4---47403115204.pdfIn PDF document text
    • https://traicaygiasi.com/Images_upload/files/redes.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/5114847632.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/58882290281.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/20176564119.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/58384548454.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16099f3ff4d06b---22538483036.pdfIn PDF document text
    • http://arslanemlak.com/E/file/28401965333.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/814b21e9bddbb51f334112539e710d0d/duzomekezoladunidid.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/19038968161.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/55283787602.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8dc0b8c9a---wakamojiludo.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/xetowenozakawub.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/zugezir.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/88161370060.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/geweruzugekirekowusalozej.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/70a5ad8d4018b4a543d0d3f5ad10c093/32150093265.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/59973228747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=strength+of+materials+problems+and+solutions+pdfPDF 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_off000101f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 17516 bytes
SHA-256: 9ef2a46aac9cdd043df8e9b110ab969d597dfd68e0bfb007bf911f5c30b58171
font_01_sfnt_off00012fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000147dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DC 11260 bytes
SHA-256: bfab944a0bbfb573abf4234860364ad8cd40c49831b734194ec1e9f227c94f22

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