Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5f33f51b8f4fda…

MALICIOUS

PDF

69.9 KB Created: 2021-09-18 09:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fbe3a21770eec8d02c3fc9a78ca601d3 SHA-1: c161d3254af0518cdd3ae1022cbeae7afbd12ac0 SHA-256: ce5f33f51b8f4fdafaf83950e1277cb524610b2d84cff7b5ec04ee6b76e8b0d1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. It also includes numerous external URIs, suggesting an attempt to redirect the user to malicious websites for phishing or further payload delivery. The PDF structure and embedded JavaScript are indicative of common techniques used to distribute malware.

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://oniceh.ru/uplcv?utm_term=authentication+problem+with+wifi+android+tablet PDF link annotation
    • http://bctlorraine.org/userfiles/file/xezuvopukuwujowe.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/laretik.pdfIn PDF document text
    • http://fohow77.ru/upload/file/31988220755.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/6ju4sfkn6tgllpuhdgrgoeead1/1953514292.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/babotid.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/bodeguginiradeget.pdfIn PDF document text
    • http://sentai.cc/data/file/20210907_165034_197.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/lozifudatix.pdfIn PDF document text
    • http://okna-kurska.ru/page_edit/_samples/userfiles/files/23262247515.pdfIn PDF document text
    • http://lagrupacio.cat/file/73970292515.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/10699595397.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/rogofemagipagoraludafamop.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109091415294065.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/wosisepofojujusubupo.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/93515995249.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/59470822374.pdfIn PDF document text
    • http://adveotec.com/img/file/68115600572.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/nuwaba.pdfIn PDF document text
    • http://yilip.net/userData/board/file/pafuse.pdfIn PDF document text
    • https://krossi.ru/images/content/files/49076655865.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/52167490669.pdfIn PDF document text
    • http://wsmr.us/userfiles/file/xufesasirosovuxew.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/fogaxabizesomopogenadav.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd74e2b5e7---4883610004.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_off0000b443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB443 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5A 11024 bytes
SHA-256: 2a7599313fc01fcf31983ba2cb518fa8ddaf034bd2fb6a24063441e145508f86
font_02_sfnt_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 14512 bytes
SHA-256: c8d47155bdee8b32cb7c5e58bf39c2be50e21d4736aa199c1a0538781eb7aa53

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