Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb25092b11a60f1…

MALICIOUS

PDF

82.4 KB Created: 2021-09-19 23:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2691177381eb2af1d69b9ced29fda5dc SHA-1: 0fe87a952ac06d5988325fad0df241e5ebf53c4c SHA-256: beb25092b11a60f1aa9fee5f4fb53cb83f6a93e6e7a77196955ea5d5223486b1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://synerhu.ru/uplcv?utm_term=jatt+james+bond+full+movie PDF link annotation
    • https://tavcam.com/upload/ckfinder/files/43232243500.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/60015408743.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/sumade.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/zuzepazujumor.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/49238313424.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/geratutetifigakasowem.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/38483049474.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/7c33d1dd584c8e892a3f39e73bf792d2/97470330108.pdfIn PDF document text
    • http://grandfiltr.com/files/file/80996187622.pdfIn PDF document text
    • https://rinducm1.com/contents/files/lironakutumowupowebagaxem.pdfIn PDF document text
    • https://tivirtual.com/userfiles/file/85614008699.pdfIn PDF document text
    • https://investkwik.com/userfiles/file/kitavafiwidedukid.pdfIn PDF document text
    • http://technocom.pl/editor/file/wobazozavepo.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/10940394361.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/jaredisegilolexi.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/4765015100.pdfIn PDF document text
    • https://costarica4d.com/contents/files/detutokekefibusamimu.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/dejebak.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/77612522250.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/47127916520.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/koxuk.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0c5bba194---javosawilu.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210903031539.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_off0000dea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA2 17228 bytes
SHA-256: ba181aa2c6b9a22d7078c08c9bc7f0f89ee742cd617a75c5114355a96295fc7b
font_01_sfnt_off00010aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E1 10844 bytes
SHA-256: 91a89ecdd2d460fec9103368577f809b583eee2117a811ceb12e22cca3864791

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