Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e95f8d3706f35b7…

MALICIOUS

PDF

94.7 KB Created: 2021-09-14 05:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4924db913c1e462411ff07c8364c9d42 SHA-1: c395c9038cd724d47012dcb4e8af847c77a4d3c1 SHA-256: 5e95f8d3706f35b76639f2d02ae17e0fb31ac1a71cb03340c539f43d0363f1ab
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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 http://ppfi-online.com/userfiles/file/23160871065.pdf In PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/favamaverufubolomaxaxuta.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/liviperevuverede.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/rineduxekukalebeguxujo.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/riguxufidif.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/69399154317.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/xazuzudaxinima.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/pezuturitilexonofasi.pdfIn PDF document text
    • https://12tiga.com/contents/files/57798514759.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/5663429926.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/40709319550.pdfIn PDF document text
    • http://sdhmladavozice.cz/userfiles/file/mepebanesuxoxakikisonida.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/jerasajajawepadejufeda.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/3924335671.pdfIn PDF document text
    • http://veterina-naslunci.cz/userfiles/file/dewip.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/dutumojomuvi.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c47ba8e3e5---80376119979.pdfIn PDF document text
    • http://jinyezi.cn/upload/49248732373.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/ladofira.pdfIn PDF document text
    • http://espokebar.com/uploads/files/80422584542.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/64346138286.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/gesakojesukuwufav.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/xaligowuk.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/99025430832.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1612fde4386466---31904884390.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/fitazipebejopobubugobeko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=dream+league+soccer+15+downloadPDF 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_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 18864 bytes
SHA-256: ad8332a6f81663842ba1bba7ddb3b864fe063bd816482781fadcdd9b07e32a22
font_01_sfnt_off00013b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001536d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1536D 10896 bytes
SHA-256: 8f26da037510d0b47635e4bddd3a861194ea32bd7735295f5864aae88544b41d