Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f84114d2f26409a…

MALICIOUS

PDF

102.2 KB Created: 2021-09-20 00:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a8d0d901d9b711049c4f32243b30f9f4 SHA-1: b40bb040780f4d50abc6248b544798903a808667 SHA-256: 4f84114d2f26409ab2a6e0dfe9bb7aff27fa739ad360734fe8aa761d844d6a06
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 domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://crysiq.ru/uplcv?utm_term=how+to+connect+android+box+to+laptop+via+hdmi PDF link annotation
    • https://mongolia-volkslift.com/uploads/files/82484319276.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/76562905888.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/838168378.pdfIn PDF document text
    • https://kenhquangcao.vn/uploads/files/52786298964.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613aad8ac4671---nefokokatorijokosut.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/62466750074.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/ralokerisusizobidi.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202109141824116850.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109101644488239.pdfIn PDF document text
    • http://www.jobibon.com/admin/userfiles/file/25090942052.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/numerizewuladatom.pdfIn PDF document text
    • http://stroyindustry.com/userfiles/file/bofinaxugokin.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/60360898154.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/23598509816.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/dexiwiji.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/ruzukapipigejimibinaj.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/25254181500.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/74065284816.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/65018044583.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/jofupavepatavolos.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/1649449610.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/32371254463.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/70694263369.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_off000125da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DA 19732 bytes
SHA-256: fed80ef22119990a9f3a0a731f3f16b47a1c7aa8d49e966919efe71543bd05cd
font_01_sfnt_off0001597f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1597F 10996 bytes
SHA-256: 9971fbd80ea7de57664aa234fefdea8b8e8d5622457fc551df055dcf202abab8
font_02_sfnt_off00017296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.