Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0928b69a40bd186…

MALICIOUS

PDF

83.8 KB Created: 2021-09-16 06:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e5fb04f99c0b5948fd19e7f13f73942c SHA-1: 2f907966627bdc571b1610f7ac4873f26aa6916e SHA-256: e0928b69a40bd18627882c1ad03fe82c9b10413a73bcb19ab4271de5de613461
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to multiple external URLs, with several hosted on compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • 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://archetipoingegneria.it/userfiles/files/bewalose.pdf In PDF document text
    • http://akvari-um.ru/userfiles/file/15420844416.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/29452350883.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/wesikozapejirasifaxipal.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/kakomabene.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/52290750664.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/jisanolemesogujepepowi.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/lirogekimikugexibup.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d57352a425---sefupudufolok.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/jezevuvekunuw.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423f28563b6---36229455228.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140621e59eff---47432405241.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/2785979234.pdfIn PDF document text
    • https://e-room.co/userfiles/file/49002101611.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/gapakumuxikotoxerofatig.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/45571449162.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/516252f3d516c8bb50ba45f19032277a/bejowuzanopukiduvazil.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/pakuzibapifazev.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/tufukomexasizesizazive.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/gizilawenaden.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/kogisewudunizede.pdfIn PDF document text
    • http://www.hausman.eu/images/wyswig_images/file/93848002219.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/tuketisofubexoruxage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=dsm+paranoid+personality+disorderPDF 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_off0000e2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A9 10668 bytes
SHA-256: 693a5918405ef1eae91a7f84290cd623a75d2139547889ff7e743e710f946eee
font_01_sfnt_off0000fb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 17860 bytes
SHA-256: 867d2cb5a497ddb3d0e96bfeb425c8e273fe06884bf45ba28b6e02991360b1f6
font_02_sfnt_off000129cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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