Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d0c0f6c3ff40e3…

MALICIOUS

PDF

81.5 KB Created: 2021-09-09 18:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 422d96fd54fb4af55027ed66d156edbe SHA-1: c9c9741cc42fb881bc1e594acad736aa647d8f40 SHA-256: d3d0c0f6c3ff40e3fddddac45a269db5e5d744d9f6e3f5c8f23893fa8378f149
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The presence of numerous external URIs, many pointing to disposable domains, and a high ML classifier score strongly indicate malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

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 http://clinton.abwingsmd.com/uploads/files/2032163569.pdf In PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8d22d28340aa8aa80044602609a956d9/sitojimanumokomezaxexal.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/vopogamelozomakiwabaniluw.pdfIn PDF document text
    • https://korankertas.com/contents/files/71170354804.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/11740816373.pdfIn PDF document text
    • https://biodez.lt/i/File/pixijaturowamarevin.pdfIn PDF document text
    • http://adriennemason.com/assets/files/sowimibamatonokevoporarox.pdfIn PDF document text
    • https://baongochoa.com/upload/file/limaperim.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/zabikukarivefedudik.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/20559544228.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/68186289110.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/0kgjcqhtk67lev4h6nul7445t0/paketikuk.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles/imagenes/womuxinarulifa.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/zazerimerorefedisugutire.pdfIn PDF document text
    • http://toonesk.com/upload/58835869135.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/nikuzoba.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/serapafewizumegafubijizo.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/soratuv.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/4813976940.pdfIn PDF document text
    • http://packamate.com/userfiles/41191395688.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/79644843935.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/potupire.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/96640905064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=the+barbell+prescription+pdfPDF 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_off0000d925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD925 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 10820 bytes
SHA-256: c32fe49ae1064b6cd6d1c6c82a4a2693dfdc7994da0c34a05f2f341cbcad5019
font_02_sfnt_off000109e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E4 18128 bytes
SHA-256: 3b3340ff2b39c1e8dc007d6019729b81142acaf5e2cdc4883037ab334c69d5d6

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