Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e0e13fa60a7432…

MALICIOUS

PDF

68.9 KB Created: 2021-09-23 18:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ebdbc82e35180e47673c7d046795f58c SHA-1: 84f833a2d3bd7f1e51c1b574f38763bfe6cf28c1 SHA-256: c8e0e13fa60a7432c18caef4a76808e9fe40c5bd900b9d16dd69ec2ad9ee4e58
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smidgel.ru/uplcv?utm_term=what+is+a+pickaninny PDF link annotation
    • https://oxfordjsr.com/userfiles/file/sifegixarovebujelivusid.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/87538418452.pdfIn PDF document text
    • https://southafricapools.com/contents/files/53132231628.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/51557981959.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/xalosikon.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/43848828372.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/fokafoxelirif.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/79088301889.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/ralarebu.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/xigupo.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/rovopulonu.pdfIn PDF document text
    • http://belovosushi.ru/files/38290344010.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/39a469ce300f2adba1015eb8a73968de/wajafubopemenanopupelole.pdfIn PDF document text
    • https://memorybg.net/app/templates/js/ckfinder/userfiles/files/3255131922.pdfIn PDF document text
    • https://ww150004.linebot.net/upfile/files/20210909163054.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/gugesajup.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/duxowowavexejopudupir.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210904_73B235893ADA7223.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/20904045031.pdfIn PDF document text
    • https://zoldlaptop.hu/ckfinder/userfiles/files/68935087361.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210917190516.pdfIn PDF document text
    • https://jin-hung.com/userfiles/file/kokiguzuladaf.pdfIn PDF document text
    • http://vongtaygiay.net/media/ftp/file/jumajodofupox.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/56404741423.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_off0000af8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8B 15712 bytes
SHA-256: 64dc8da5d6f997367eb53909bb3ea1c460a4fb987df0fdf09d1a05ef2eda781f
font_01_sfnt_off0000d72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 10272 bytes
SHA-256: 0ad2a97a05ec99f7f42c77f411fdbc6981ec0290a6003b8f82d93759ac6e29ae

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