Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ce62459c80a33a…

MALICIOUS

PDF

84.2 KB Created: 2021-09-16 06:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 776e123bde960fd5f2b776ce28f003a8 SHA-1: 5bde90b872524badaf1c8654b19f951a6a042ff7 SHA-256: 46ce62459c80a33a96bff2d4f2fcfffb7a6d7813b214226d8c00a03d2eab3c39
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML and ClamAV as malicious, with critical and high severity heuristics indicating a malicious PDF. The presence of embedded JavaScript and a large number of external URIs, many pointing to disposable domains, strongly suggests a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=meilleur+jeu+manager+foot+android PDF link annotation
    • http://vejwun.cz/images/minipidexapirogovejokesej.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/degeliwumakufenu.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/demudexarapakim.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210916033841_1054750367.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/xefegivi.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/luvura.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/68189959654.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da6b628122---13972077792.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/kupadexonimex.pdfIn PDF document text
    • http://tao-ssct.org/data/upload/file/povutizesivuzemopi.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/womesesasisofe.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/dopufape.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/vipeliseki.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/18128826875.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/8psbneesktavsdoa27dd2sb6n3/bilobepag.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/37116387803.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/lubetotufokokamizoleron.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/61203312467.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/23556100988.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/32994675818.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/44086033246.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_off0000e440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE440 18656 bytes
SHA-256: 3c570cfa837208d1122aaebb541339cbb0cb46b85553486da10a0922ad6bdee1
font_01_sfnt_off0001128b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128B 10752 bytes
SHA-256: e6cb2f2e1fee5da6f8af27fdd4c6ce89296f41d2684d6b84d0d8f4c843b61d1e
font_02_sfnt_off00012afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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