Malicious PDF — malware analysis report

Static analysis result for SHA-256 659ad02237f4e5f3…

MALICIOUS

PDF

80.5 KB Created: 2021-09-19 15:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 06c69b1bf2b1f25fccf79796e65f7cd9 SHA-1: eb5c33ecfdfbeedbbce17e7d53f74f4e69441aaa SHA-256: 659ad02237f4e5f39fcf67541812d1917b2277525b2334825599e2f81e179f6e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it's designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use as a delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://irlanc.ru/uplcv?utm_term=double+horizontal+bar+graph PDF link annotation
    • http://avatars.ru/userfiles/file/kezevumovisalupiwataj.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/14710894509.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c661373344dcf1d404c49214ee20516f/10014048429.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/dosidenizorezes.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/35247970830.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/lojomuwitunesapuxisivim.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/kiwudafat.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/88959771358.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/mimurunoralumufu.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/fenerajuvonawejimilotipaf.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/gukoxakalofolobubufav.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/rozilepej.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/zukujivavegek.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/90570632880.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16134233c897cc---31346547987.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613eeb8d44afe---54486456701.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/zadinoxakenutasurazu.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/86158258258.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/falakememodozomot.pdfIn PDF document text
    • http://cbstav.cz/file/namasesatepenup.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/63653187875.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/pijodipimixisigolanapa.pdfIn PDF document text
    • 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_off0000d72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 17612 bytes
SHA-256: cb19e5763502e3953017630d2297662e5aa268d2a1435312ff6d0270f52bf89d
font_02_sfnt_off00011cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC5 10664 bytes
SHA-256: 720efab1d54f380ab7cda64b0a6ead51f8e48e73f7994d47dd14b92e35b4278f

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