Malicious PDF — malware analysis report

Static analysis result for SHA-256 64db15b90738babd…

MALICIOUS

PDF

76.1 KB Created: 2021-09-15 16:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 29c7596176b6ec309fe309808e4cee49 SHA-1: 201effa90c3afe165241e145f83852046875f192 SHA-256: 64db15b90738babd60ab1fbda351eaab85aa527a69cbaf1c50d18fe5ccbf5b36
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded JavaScript and numerous links suggest an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pixomot.ru/uplcv?utm_term=coc+hack+unlimited+everything+download PDF link annotation
    • https://galedo.cz/www/data/cms_files/files/balevopijerefa.pdfIn PDF document text
    • http://reckdance.pl/userfiles/file/vapifudefanewunad.pdfIn PDF document text
    • https://durimawar.com/contents/files/51184262558.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/kopip.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/80263649206.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/75055658012.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/88451891339.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/21916619495.pdfIn PDF document text
    • http://omni-links.com/images/blog/file/nutapifewagizaruvupe.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/78759044515.pdfIn PDF document text
    • http://lmtechsolution.com/userfiles/13317854553.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1614170a0d8ba1---vuteselebulubavajoxag.pdfIn PDF document text
    • http://denetimmusavirlik.com/userfiles/file/61899534293.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/menupamiwopewipatatoveb.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/30039806378.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/zufuxikoxivolevetegekizi.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/95101717093.pdfIn PDF document text
    • https://thisissati.com/userfiles/files/rasanunowasuzutipujira.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/514023923.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/61451037858.pdfIn PDF document text
    • https://xn--fct5g39pjpo.tw/upload/leakstop/files/46758432998.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/fufurojis.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/029f16040dae6a51b4085c0c655265c8/binaxuw.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/11338610494.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_off0000c6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000deb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB6 16504 bytes
SHA-256: ea24ecffe94758d248aa2994174c231f37b1d943db8fe90d344a41b8ce95fe50
font_02_sfnt_off0001090f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090F 11136 bytes
SHA-256: a10840b2626fe13b3d3cb316249cf11acb98cf39080a402acdaa5737f1470ae7

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