Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3242e74633feef6…

MALICIOUS

PDF

78.2 KB Created: 2021-09-13 04:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 193636c6f248e7b62bc0eb40346b7be6 SHA-1: 7e0d18611aa871e6d64248423b9e48152f757466 SHA-256: e3242e74633feef6a70491efc168a0d7bc3fe74594d3d51cafdc635fb0ac7d3d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious content or redirecting users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is structured as a link farm on disposable hosting, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6141

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/muwud.pdf In PDF document text
    • https://myshalewell.com/userfiles/file/pikogidodol.pdfIn PDF document text
    • http://srs-budapest.hu/uploads/files/tumazenulokiboti.pdfIn PDF document text
    • https://kemxoithanhhang.vn/app/webroot/files/images/pages/files/78659785599.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/55838838012.pdfIn PDF document text
    • http://perechen-izdaniy.ru/js/ckfinder/userfiles/files/66850238296.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://nbkhjc.com/uploads/202109/file/2109031655127446488lgt2a48igvp.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109080743395774.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/zijeni.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae8ace606f---69376031860.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/5705526584.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/61719935439.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/laserumaferajexifizelesob.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613414eae9034---wupixipudagumewuxu.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210909_21A7DDDEC77F8FA3.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/bereduzufukapogosulil.pdfIn PDF document text
    • https://1tlstar.com/storage/uploads/files/nomijekoweka.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/19238719274.pdfIn PDF document text
    • https://novitas.ro/files/vemaw.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/40666095350.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/pavigogodanagepemi.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/87151396087.pdfIn PDF document text
    • http://kodemari.info/data/files/bimizawumexezuvilek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=poi+automapa+androidPDF link annotation
    • 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_off0000db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0F 10308 bytes
SHA-256: d78af77b4be44512d58b4af56d1fda84047ffda257c397d8d9fa23328df3277e
font_01_sfnt_off0000f238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4A 17960 bytes
SHA-256: 72cf0d7d1334a956a0fa6cf616d9b8fc71ce9315de15dcbae6d48ddef2ac6ba3

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