Malicious PDF — malware analysis report

Static analysis result for SHA-256 e884819ffd122bd9…

MALICIOUS

PDF

80.6 KB Created: 2021-09-16 20:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b577b50e1e9e9b3df6079efbd1e09bf3 SHA-1: f0c3b51d859cbbe52b36d7e3be6f5ad24b6dcc27 SHA-256: e884819ffd122bd91bf2e0f95654f9a740f5879787c55babadfd4b3d5d8f5622
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The presence of numerous external links, many pointing to PDF files on different domains, suggests a link farm or redirection mechanism intended to lead the user to malicious content. The 'SE_URGENCY_LURE' heuristic indicates the document likely uses deceptive language to prompt user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xn--80adic7alej3d.xn--p1ai/userfiles/file/90976022577.pdf In PDF document text
    • https://123natura.com/stockages/files/92417830269.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/71961811303.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/soletazove.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/22364179113.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/42194893179.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/pinonorumonopowal.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/92616224803.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/bokenijefotugami.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/lezigalekevekuwunof.pdfIn PDF document text
    • http://praguetransfer.com/files/file/59723521876.pdfIn PDF document text
    • https://advantage.ee/media/contents/file/29218957446.pdfIn PDF document text
    • https://kocarbonag.com/luutru/files/panegugofakudetobawuli.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/sofazetixodititojig.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/lirapazuko.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/vizoxipikes.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/bukevifakebeje.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613550f3891f3---33913735339.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/sikusawudezavesamusel.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4ebb5274f---sugulo.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/86801567652.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/42390259856.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/sikibiluwusefof.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/29909001024.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/53826646997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=vba+mcq+questions+and+answers+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_off0000d3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 18072 bytes
SHA-256: c84d52c2c9601adcd7bb8e693ceddcdf75c800498c80c9526f4ee7924e3ddd39
font_02_sfnt_off00011a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9C 11176 bytes
SHA-256: 954e54f2fbb3c6789e2581cf921516e3ce925f82122634068711302751ea7d37