Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6282a0f1203510f…

MALICIOUS

PDF

83.7 KB Created: 2021-09-16 12:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 854f6c5284a6557b4891da37cdc1f52d SHA-1: c224572f75d845103fa59816a0457e796fcf7509 SHA-256: c6282a0f1203510f9a20b4cc8dc5abd234ce4305c557582b189bc62cb22367cd
134 Risk Score

Malware Insights

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

The sample contains embedded JavaScript, a common technique for malicious PDFs to execute code or redirect users. The PDF also functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. This behavior strongly suggests a phishing or malware distribution campaign, with the embedded JavaScript likely initiating the redirection or payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://drafthe.ru/uplcv?utm_term=does+wipe+cache+partition+delete+everything PDF link annotation
    • http://horizonpestservices.com/userfile/votowupugifewadutubitozil.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/24005188575.pdfIn PDF document text
    • http://df-2.de/images/daten/file/75165661823.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/lawenanijovexudegafobafas.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/fuzumofosozituk.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/29973165778.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/88457983665.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/votedozelujaxetetamu.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/34645753400.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140bac8864eb---pobetaxovelifuzowademaze.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/86320860991.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/tenikitogofuk.pdfIn PDF document text
    • https://goodline.by/userfiles/file/84515926755.pdfIn PDF document text
    • http://wohingltd.com/userfiles/rimuresukeninolulute.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/karijatesedesu.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/30716102744.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/dejusapuvonene.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/newexuradili.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/zifomurojojepagiboja.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/22896772684.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/gugexevosow.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/ledozufozuga.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/bitireviso.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/30104768628.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/79279289323.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161300af38f965---61911887042.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_off0000e19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19E 17708 bytes
SHA-256: 35a1cc1d9fb51bc9895fcc3ba157589befae7e51c7d9412515a9b7236fd0d334
font_01_sfnt_off00010efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12713 11060 bytes
SHA-256: 39a287a6c824d785a746368c23c4cfd10832935917b8d7bba4cf1348b4ad79bf