Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9529b41d70241b…

MALICIOUS

PDF

84.1 KB Created: 2021-09-13 20:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 67e75eb48064bdd468344e5565e1b849 SHA-1: 95f60b093042c5c0a50d45c4ecc62e9f878de2c1 SHA-256: ed9529b41d70241b7f110bca62da620db2c15fe3235fb04203fe88196c0a1b66
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://lecormier-menuiserie.com/www/upload/files/82444133380.pdf In PDF document text
    • http://turbotechnik24.de/userfiles/file/lufuguvanesij.pdfIn PDF document text
    • http://lg-palette.com/upload/files/97271754685.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/sagedalasarefevifepat.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/5020015083.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/damonisaxapenaxem.pdfIn PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/vijib.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/ridinobowuta.pdfIn PDF document text
    • http://exosushi.com/uploads/files/92996672843.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/31965690186.pdfIn PDF document text
    • https://mimpidia.com/contents/files/kavatoxizefetenodajesarim.pdfIn PDF document text
    • http://beiks.info/public/file/53843618816.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/zigoregaxezufogokapune.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/2013409257.pdfIn PDF document text
    • http://daiichigroup.net/uploads/news_file/ziduvodidanirunerazaro.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/vivuzoteromutigujijat.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/97261328542.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/tipusafikitofuz.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/xugoserar.pdfIn PDF document text
    • https://istruttorecinofilo.it/userfiles/file/24666084585.pdfIn PDF document text
    • http://skncn.com/u/files/jikojalenokajomoserizuzun.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/uuuuju0g7sq40coj42qibq47n8/nogorusumilifosodazofekug.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/pagakejit.pdfIn PDF document text
    • http://parilka.by/var/upload/file/mabifukup.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/kokesonubemozipaja.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/9a71be22122c82cf8ce75806aa0592d1/pededujigunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ninjago+tournament+free+downloadPDF 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_off0000de45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 10824 bytes
SHA-256: eeca0047f3c408d909d4db084debdc9c8ae6a21a75b18b36345807c54725931a
font_02_sfnt_off00010f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F17 19792 bytes
SHA-256: 3ac7dfde57e0edcc1f756db2bd1f56d9b3aa29e3c32a6e2c86724c118f06d508