Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19e74cb444f23ff…

MALICIOUS

PDF

78.2 KB Created: 2021-09-14 11:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8af765fca90b0dc0908b318fda265d80 SHA-1: e0b25fc72205251d30b5596d765d9773f901dc3a SHA-256: f19e74cb444f23ff8a69bddbe9d4489f4d90876a51288f92a1d6cc87060741c7
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://wildzipper.com/clients/wildzipper/userfiles/file/31956732505.pdf In PDF document text
    • https://izometal.net/mm/file/96734321171.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/30502301582.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/23709558366.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/09/file/202109132228381917.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/90fe10811e80c9eede8b9bb58d0a5c5a/35633820629.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/46905807320.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/losemowexosofejidesoge.pdfIn PDF document text
    • https://il-gusto.com/images/file/71546976276.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/rekavupofoged.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/61352322ec0e4.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/fd250889b6e6fad1978490a7db745f07/80472941043.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/zumoxew.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/ruterudefojev.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/tevovaxevetakem.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/60731326753.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/28687028613.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/linokelupagitisudinaza.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/kinobevumufatuni.pdfIn PDF document text
    • https://kawanmto.com/contents/files/gesotejitigeguseta.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/piruzowaremodiweje.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210905/file/43215094047.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/31352395291.pdfIn PDF document text
    • http://fitviewer.com/files/file/lufegevolanab.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/pefazananipiranu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=mi+box+4+miracastPDF 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_off0000cbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD0 18052 bytes
SHA-256: 1247b06ee609e9690fa6ba9262efb2e59d493057873a57cced67ebc11cff6c10
font_01_sfnt_off0000fb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB03 10424 bytes
SHA-256: 06fde85ae6c5ffee254921a9ce69c3bd2e4cac74bec21193b545141a7f3c1dcf
font_02_sfnt_off000112c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1