Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46a6832f3341431…

MALICIOUS

PDF

82.2 KB Created: 2021-09-03 01:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 52ffa1afbd34981101824d107a424baf SHA-1: 40c7a4015789358c8bd995451d62741d50005e13 SHA-256: e46a6832f334143163eabd13b1cfd499ace57426b59bb5d86edf349cbb78c8ea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The 'SE_INVOICE_LURE' heuristic indicates the document's content is likely a fake invoice or payment request to entice clicks. ClamAV detection as 'Pdf.Phishing.Trojan' further confirms its malicious nature, likely serving as a phishing lure or a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=account+receivable+and+payable+pdf PDF link annotation
    • http://copy2d.com/ftp/image/file/wigudawilirikaruvitijeb.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/45340586678.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2282567e1---67043681952.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/kufudajuzitazibotazuve.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/161136a0601fcf---4412532616.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5567ed50b6---4517537027.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/jukawavusomozi.pdfIn PDF document text
    • https://maplesservice.com/wp-content/plugins/super-forms/uploads/php/files/1375ca4b38894c196a933658cfda0e31/wevisujeboxetegi.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ph7smqb7k6di7lirp3s16oh12s/38686584370.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/bujatu.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/3b823e2d43af9e6b65fb9601d310e33b/69832235205.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/73108284034.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/51534419576.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/75430172042.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/revabip.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/agsmvlvr3h00c5isch46tjm3b4/25976636316.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/noxexifoni.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/9036534909.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/75806715521.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/86724147278.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f94d3e512e---vibukafojatemisidevevale.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/loreto.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/dosasigofi.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_off0000dac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC4 10844 bytes
SHA-256: 7e5b6a358c5515325a30c61be0d1ae37c264acd6c1a74aad0b3cf5c14b52a7ce
font_01_sfnt_off0000f3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD4 18404 bytes
SHA-256: a6204828da440d788fc4fe0febd2620f7b6254416ec6da12b800898eb4de4d55

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