Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5a4db0f999d09f…

MALICIOUS

PDF

88.2 KB Created: 2021-09-20 22:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 465a1f38ef573829eedcccde0459c7ef SHA-1: c042b485ef993f7fbfca0ac6964bba487d9ba4f5 SHA-256: ed5a4db0f999d09fa9c13f6c1e0eedbe8b7f4ca27a01b527c09ec9a3973fc1a2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 https://philabc.ru/uplcv?utm_term=king+of+scars+read+online+free+pdf PDF link annotation
    • https://reazfarah.com/ckfinder/userfiles/files/deganojonezotonogura.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/dolax.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/nowatimuvoxatosometimiwef.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/96476301914.pdfIn PDF document text
    • https://macjiboter.macjahisa.si/files/file/19835539754.pdfIn PDF document text
    • http://itcck.org/upload/editor/file/59333584552.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613452359c13b---padomiw.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147d6bb153d3---vavorimajijimixav.pdfIn PDF document text
    • http://phulieumaymacbaoco.com/hinhanh_fckeditor/file/35727375921.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///98100202214.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/20272045460.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/84347545895.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/rogabilimolokanagobe.pdfIn PDF document text
    • https://tigapilar.com/upload/files/85027152238.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/vugajarusususizijuxovo.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/denuxemege.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/27051959853.pdfIn PDF document text
    • http://shopcode.ru/uploads/file/jesizejet.pdfIn PDF document text
    • http://adice-area.com/pictures/files/benirafidega.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/57451379786.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/difuwet.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/85511772851.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/vurife.pdfIn PDF document text
    • 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_off0000f362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF362 18052 bytes
SHA-256: 858f35c4dbbaa81967d397da622dd0d803cd779471f94ba2c6ed4dd67bc51498
font_01_sfnt_off0001225c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225C 10688 bytes
SHA-256: 98d2670dc417f81a40f11955ff24e0a88bd39783748300e646da6870b2db25f3
font_02_sfnt_off00013ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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