Malicious PDF — malware analysis report

Static analysis result for SHA-256 60813dc78944e437…

MALICIOUS

PDF

71.4 KB Created: 2021-09-27 02:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab079e7c833d3e48fb143fdd63594e47 SHA-1: cf2d70d0ad8b245ae626df969d32dd3e154082a8 SHA-256: 60813dc78944e4379781132c4020298a8e927e44060e5e39867c09156cedf7db
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further payloads or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://medvor.ru/uplcv?utm_term=it+chapter+two+gomovies
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/52006714054.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1614075d469bc0---siluzixixexumabazalofexa.pdf
    • http://paulgraphics.paulsfashion.in/files/genizarepukonewutosove.pdf
    • http://meta-min.com/files/gufelofigamowodegix.pdf
    • https://suavitinhtannha.net/upload/files/62328374290.pdf
    • http://31kouqiang.com/userfiles/file/1632692665.pdf
    • http://agisinfo.ru/uploads/content/files/mexuzamofinenon.pdf
    • http://werkschoenenverkoop.nl/images/docman/files/25277489385.pdf
    • http://oxigensupplies.com/shipinc/userfiles/files/senavuxowufafoleze.pdf
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/tazakopalawilivevejekabu.pdf
    • https://inprovitmexico.com/ckfinder/userfiles/files/81105506278.pdf
    • https://bor-diing.com/upload/files/46325628710.pdf
    • https://nedimgame.com/calisma2/files/uploads/xunivawegumedobot.pdf
    • http://boldino-hotel.com/ckfinder/userfiles/files/31023626090.pdf
    • http://hyundai-dongdo.vn/images/files/ponaridubi.pdf
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/54468126226.pdf
    • http://wildpflanzen-planung.de/file/92737469298.pdf
    • https://proia.bg/userfiles/file/sowuwenikanejit.pdf
    • http://quangcaosmsgiare.com/media/ftp/file/32924751047.pdf
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/49564127527.pdf
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/59933553219.pdf
    • https://lixtech.com.tw/ckfinder/ckfiles/files/gemodarilejet.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16145fc349ba2b---55905931119.pdf
    • https://mgs-on-track.com/app/webroot/userfiles/file/gifuwotesakepumigakudiv.pdf
    • https://tradingcall.in/ckfinder/userfiles/files/debufidokozera.pdf
    • http://tzsunup.com/upload/vewarubovomilawonujafip.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b248.bin
add5a78b45a05c218796ae459960ec0f606bf090ae4da4aaf026f9bcbfe34f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB248 10772 bytes
font_01_sfnt_off0000cb3c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3C 16792 bytes
font_02_sfnt_off0000e34e.bin
cb9ddd4d7ddb017f6b4a24adc8cee02ecad89585c271021ce31262e8b8ec6b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 17240 bytes

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