Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34e8a027dfa25e2…

MALICIOUS

PDF

78.8 KB Created: 2021-09-14 02:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3f595b4f9216655d57bdbac0805be790 SHA-1: 09ff4a7440a861bba9149909f5f4357d69410e39 SHA-256: e34e8a027dfa25e26d1205ad18df80427ed5fe7c52a27114d86f2a2eafbb988f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to domains that appear to be used for hosting malicious files or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of distinct links on disposable hosting, suggesting a coordinated effort to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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.
  • 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 http://shangrilatheshow.com/ckfinder/userfiles/files/kawomup.pdf In PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/80884469730.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/70038444231.pdfIn PDF document text
    • https://fratellifurloni.it/file/12580910215.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/51270664554.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/77645370103.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/bigunivuxewanev.pdfIn PDF document text
    • http://peoplefineart.com/assets/202109/files/20210909112554968950.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/12852283108.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/26538180372.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/wemimineluzesu.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/11142909685.pdfIn PDF document text
    • http://namngonviet.com/user-/files/xiwonaranobuzi.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/vateranugelowu.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/28413046822.pdfIn PDF document text
    • http://szm.hu/userfiles/file/lugubepatuse.pdfIn PDF document text
    • https://onlinendttraining.com/files/niguzusejoridewubibo.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1613269c928e76---renusunuz.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/30509590880.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/47889377631.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/zinujazurov.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/86064384770.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/zavurogitiboravefirin.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa9ffbae19---newusenumajogoxekexewuwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+long+cooked+chicken+fridgePDF link annotation
    • 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_off0000d0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E2 17552 bytes
SHA-256: 7009a2e43fdbc26e61c43c08cc01252800f702471a121e7a6fdfb6d8f5217887
font_01_sfnt_off0000fe19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE19 10496 bytes
SHA-256: a5db40ccf7d60a8def27f656b93c68662d5bef2bfbe0a80326e47f4a297b89d7
font_02_sfnt_off000115a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1