Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2e3da90afd04f0…

MALICIOUS

PDF

79.4 KB Created: 2021-09-18 05:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 75af39161fcd57b5ae2f7a438a318380 SHA-1: 15fff3505a520c8a8512df066acd8b938added9e SHA-256: 6c2e3da90afd04f08828efb49365a4e3a0e5ae3adbf5f72cb2e07a4ed3731197
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=rr3+update+9.5 PDF link annotation
    • https://mr-alian.com/upload/ckfinder/files/dixazejuwipopamosorefi.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/juxezipifituwitizodibo.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/babaxadexoxevizizoros.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/kifigekubiv.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/duwowalimapapegaguzeb.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/gusosebabilesi.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/nanolovut.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/vigamefa.pdfIn PDF document text
    • http://congtyvima.com/images/Download/24901496012.pdfIn PDF document text
    • https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/21497780751.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613422e3d8b39---44095579820.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/29955192873.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/berapedofukodalapugo.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/b7ffec29bc177d4608b16e73d6ea85c1/lirojujadelaguvewawunuz.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/jibeberunovelebigijinusa.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/11400403937.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/febebanojirotajivejijupup.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/dipewixol.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202109140722374430.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/kiwizozajo.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/41836178962.pdfIn PDF document text
    • http://tochalco.com/uploads/files/xodivoberutegeripuvoxi.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/gulusosonilozarurofilasu.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_off0000d1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 17720 bytes
SHA-256: bc19cd9f7b47dcb525d7a75d88e3dbe1dabe18d368094d208cf036d8ce83e5d9
font_02_sfnt_off000117e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E8 10540 bytes
SHA-256: 61b1cf4cdca88138b8670abff6803a8d1fe3584a878fd39ae56f3425f53b087b