Malicious PDF — malware analysis report

Static analysis result for SHA-256 b003b00ff230a666…

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 22:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 06c552924284d40ecd9354a04bc73f20 SHA-1: d96de3e34f6c63c9a472f4d59dda5357abf5d808 SHA-256: b003b00ff230a666ffa43b5b0f54b493ee112e699d01b5128fc74b8b2a8ffc6d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload or phish users. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=among+us+mod+for+minecraft+pe PDF link annotation
    • http://msdoubrava.cz/foto/images/file/kaxetuled.pdfIn PDF document text
    • http://kag.fr/userfiles/file/vavagewowirefuti.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/domaf.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/29551944858.pdfIn PDF document text
    • http://ellev.fr/upload/files/samiwekubudejoti.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/46783700835.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/23c307f78c4a470bfb95e0d9588ceff6/tamudatudukinawap.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/84736302065.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/wuzofamemonifisigefet.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/22761779067.pdfIn PDF document text
    • http://friulanapanini.com/images/file/masolidakexuwa.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/bikogapedosokaro.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/zijemolaba.pdfIn PDF document text
    • http://skmsm.com/userData/board/file/radogulodidenuje.pdfIn PDF document text
    • https://zhansq.cn/upload/file/mepariwixu.pdfIn PDF document text
    • http://rts-3.ru/upload/files/23612119868.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/31431934909.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/fovujasupowopumutidoko.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/tozivoriluzud.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/tedazuxakazomujixisone.pdfIn PDF document text
    • https://baptistfriends.org/media/93276273775.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/wesidamurawatewugasez.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/pupuxonemaw.pdfIn PDF document text
    • http://ledins.lv/cms/file/demixexizujekug.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/kimilabal.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_off0000ce0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0C 18524 bytes
SHA-256: 8298721f486a4f35c56bedaf4d5c8f2435bea385250c4660b220ff1f33abedc1
font_01_sfnt_off0000fdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAF 11000 bytes
SHA-256: 532b2441ce865e3bc7c5279513c3e5e8a0a3c1d4bf2b6c583a727b00e7f6fa6b
font_02_sfnt_off00011715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11715 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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