Malicious PDF — malware analysis report

Static analysis result for SHA-256 965f691b82092862…

MALICIOUS

PDF

69.1 KB Created: 2021-09-30 15:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c25b2423ce99a693358c468d861bc2eb SHA-1: aec5772a91abd612cef1545e22d42abeb96eaebd SHA-256: 965f691b82092862a8cda753ab2cc8fefacf7b9c4ada69ad1231c037d87ba092
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and a high number of external URIs, coupled with a critical ClamAV detection and ML classifier flagging, strongly indicates malicious intent. The PDF appears to be a link farm designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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://libron.pl/fckupload/assets/file/kanaluwejogaxuriwi.pdf In PDF document text
    • http://robedecreateur.com/img/files/zogorosunofusox.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/30204516552.pdfIn PDF document text
    • http://recepti.plovdivweek.com/js/ckfinder/userfiles/files/5166733851.pdfIn PDF document text
    • http://maysoi.com/hinhanh_fckeditor/file/12638592313.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613012609f02a---setowezevur.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/93018941914.pdfIn PDF document text
    • https://myoffice.strategygroupglobal.com/uploads/files/vedavowikopimutojige.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/pezugawevinupuretixozuga.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/kevajusezidolenej.pdfIn PDF document text
    • https://shidoremicrosys.com/media/62710040904.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/86764941405.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/rusudepeb.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/zoleribuganekiputelap.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/11314081505.pdfIn PDF document text
    • http://bjjiffy.com/upload/80536578607.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0a1427c4a---kitowesokefobajire.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/37130777994.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/17096949382.pdfIn PDF document text
    • https://arslanemlak.com/E/file/In PDF document text
    • http://zatexpress.com/upload/userfiles/files/32142912181.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/dobugiforelumagug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=hotel+stories+mod+apkPDF 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_off0000b01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01C 15192 bytes
SHA-256: aaf22c711cd024b4bd6abe74589897492333afdb808540ba4b32b3584053352f
font_01_sfnt_off0000d69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 10532 bytes
SHA-256: 6979a3bd36d551b4b84ed27e6a9770a812b242d5b7561b9cb0e6f46593399c68

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