Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb058171af53b2b…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 00:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 24ae76ab84a12607bad50d83578e7e1e SHA-1: abeb94cf42d59074cf55585bc1ae958d76a51042 SHA-256: 0bb058171af53b2bbdb2129a3c0f4a3432ec7196043fb044c1863cbf6d0bdb89
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://chcial.ru/uplcv?utm_term=why+is+fortnite+save+the+world+not+free PDF link annotation
    • https://xn--80ag1a2a.xn--p1ai/files/file/29199455889.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/pilomawesexuxoxep.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/turenenawuxat.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/21848031000.pdfIn PDF document text
    • https://siroyensao.com/upload/files/milukarizo.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/pubuzidevuda.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/16543226111.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/8257624510.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-9/20210909115150267918.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/64398358120.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/5117665461.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/jalipi.pdfIn PDF document text
    • http://salespate.com/userfiles/file/nabejaxobufelebupubigo.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/fugakopesekupinu.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/10677009709.pdfIn PDF document text
    • http://519pf.com/userfiles/files/92388548183.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/19541664292.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/xawopam.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/47117200150.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/vusifozebuv.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/86472437421.pdfIn PDF document text
    • http://deforma.it/userfiles/files/muvan.pdfIn PDF document text
    • http://cordovajewelry.com/images/file/vasur.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed83415b5b---gixovekamanixakonosaxira.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_off0000df00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF00 17360 bytes
SHA-256: 7953f0909f4f220f9401d3675441a680ff2f0093b0451e719f40e53769adc572
font_01_sfnt_off00010c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7B 10712 bytes
SHA-256: 20bbb6defac2930e0c002e946e0141b258960bd0a0e18dd72a7c55ecb4958599
font_02_sfnt_off0001251d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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