Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaab4d198be31823…

MALICIOUS

PDF

84.8 KB Created: 2021-09-13 15:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f3d406f87bbea905173a89a3795a2b04 SHA-1: 72bb7e1a913875c01560274abd1232504d788ebf SHA-256: eaab4d198be31823c0177c29ad6fce3f80bf4aedb9fca11659b9404b86538c4c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://dunaweb.co/bg_image/files/88873608812.pdf In PDF document text
    • https://arhstroi.by/uploads/files/nokuwugif.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/32787721861.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/wixokiwisepesowelakede.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/23329225177.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/xufirani.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/xilexafogo.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/soburepevukevi.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/xumofowawujime.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/10124657738.pdfIn PDF document text
    • http://aven.su/userfiles/file/61154109018.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/relubomubavowubariv.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/xalodetupemevopeka.pdfIn PDF document text
    • http://gruppopolidori.com/upload/image/file/jediworewaguvugosamuf.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/69772462115.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/25741106719.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d201f0ec5b---memutefinowutubilanidezo.pdfIn PDF document text
    • https://doitoutdoorz.com/file/jbpj0wjgYCDI8TyK.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/613ef4fc2714b.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16131bf8153a1c---sogogu.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/tusewi.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/lodefivenuwupumufoligixez.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/55308067486.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/53219309803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=pokemon+sword+and+shield+android+gameplayPDF 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_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB38 18300 bytes
SHA-256: 2f3e0f4c712d866c4e0e4e48056cb473574e2a470f151ac7f9be6bfc72d40fcc
font_02_sfnt_off00012a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A95 11032 bytes
SHA-256: 3dcbceaf8c649310eeb491f5dfb92c18bce3a3942eeac3976788f08b8feba789

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