Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f12767cae50799…

MALICIOUS

PDF

80.5 KB Created: 2021-09-19 03:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7db24217147510551cee2c1f722bb09c SHA-1: a0ce599016c49649615c6660dccb1fc222fbf595 SHA-256: 00f12767cae50799468542ff376b52f12436777da504c76af5da7cf286d5a147
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, and ClamAV detection as Pdf.Phishing.Trojan suggests a phishing or malware distribution intent. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.julietlandau.com/fckeditor/userfiles/file/vopuposoxibowasode.pdf In PDF document text
    • http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/rokusijebedifoda.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/78654850156.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/51704393340.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dujipunaranuv.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/79562184000.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/limomexaxezomiler.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d92e8a82f---3415056685.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/91527226374.pdfIn PDF document text
    • http://cosmoscm.com/contents/files/55123276358.pdfIn PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/navevaradazojazigefeb.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/53209118887.pdfIn PDF document text
    • http://yuli-china.ru/d/files/watetilexibim.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/virewapililezonib.pdfIn PDF document text
    • http://hanyangsteel.com/files/fckeditor/file/1883586918614303e3549e5.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/xadajupugegubifefono.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/gatemunilegulasaro.pdfIn PDF document text
    • https://awinresource.com/uploadfile/file/48275485278.pdfIn PDF document text
    • http://julianina.dk/upload/file/tasofevajigutagovetikela.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/regawevirawop.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/jokepuxavujekososativi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=iphone+5+cellular+data+not+workingPDF 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_off0000d50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50A 10988 bytes
SHA-256: 5578bed149d095c472eab8ece5d386b1e6bd3339cb1928ce03678044b7b7aa94
font_01_sfnt_off0000ee5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5E 17504 bytes
SHA-256: d254ac8f271cd9bc0125ff9d2d68c7de559684e1a1d578679dad363b217fa3ff
font_02_sfnt_off00011c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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