Malicious PDF — malware analysis report

Static analysis result for SHA-256 080bb7f8625af36d…

MALICIOUS

PDF

86.0 KB Created: 2021-09-09 04:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: be967d3718a3248aed72f86c55d20c7f SHA-1: d986b3830d3cfe744381f5bce3520cafd3520520 SHA-256: 080bb7f8625af36d3ec55550f430f43f95eba6e2d34d442ff3479312a0f21e43
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains embedded JavaScript and heuristics indicate it is a browser extension/update installation lure, a common social-engineering tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for credential theft or malware delivery. The document body is heavily obfuscated and unreadable, but the presence of embedded JS and the 'SE_BROWSER_INSTALL_LURE' heuristic are key indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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
  • 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://thecargonepal.com/userfiles/file/51629888652.pdf In PDF document text
    • http://uptindia.com/newsimages/file///35630092066.pdfIn PDF document text
    • http://jawarakreasi.com/file/voluforebaboxu.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/suruzed.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/77744462061.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/sodekunomatuwe.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/25963228239.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/8325340533.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/76496860918.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/faxanidufavosalu.pdfIn PDF document text
    • https://theipbuzz.com/images/file/lejuvuwuwodexi.pdfIn PDF document text
    • https://matratva.in/userfiles/file/31755056779.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/39917834737.pdfIn PDF document text
    • http://ideviceplus.be/app/webroot/files/userfiles/files/sixijesumefasik.pdfIn PDF document text
    • https://thepainter.asia/upload/files/jotonozobawebeme.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/98784880933.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/sodizorar.pdfIn PDF document text
    • https://funke.be/data/file/boxojenu.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/93525040982.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/03/32028184600.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/97569846442.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/93752698684.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/lefuwuvinonipujatix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=content+transfer+for+android+to+iphonePDF 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_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 10580 bytes
SHA-256: eb6fecaafc39b50dcad158753c511b0e5da637a02bcfcbb8264ceb44309ae4b5
font_01_sfnt_off000105d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 17252 bytes
SHA-256: 90e412e32fbfa80b7f2f0616d705c6b6ff00e80c21acb26a6045c5059fce14fd
font_02_sfnt_off0001320f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1