Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8af976f5d7b7563…

MALICIOUS

PDF

69.5 KB Created: 2021-09-29 02:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 7db357973b938d7e61438ef2235a8a6a SHA-1: 7f51a883f86e20d5d45abc5790016d7c01c3d2a5 SHA-256: d8af976f5d7b75634dbd6aefae60d0ad2440266f13c50271332d5e19682796d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous disposable domains and compromised CMS uploads, indicating a phishing or malware distribution attempt. Heuristics and ML classifiers strongly suggest malicious intent, with ClamAV identifying it as a phishing trojan. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://crysiq.ru/uplcv?utm_term=watch+saints+and+sinners+season+2+putlockers PDF link annotation
    • http://hebammenglueck.de/ckfinder/userfiles/files/wefodudito.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/12136149743.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/xalifurubowitesunilesax.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/98821084848.pdfIn PDF document text
    • http://cascad-trans.ru/files/gifalebukenudi.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/wolitagevukeruwepiraluwo.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/fomekid.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/kufifulirotexe.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4491199026.pdfIn PDF document text
    • http://client.diffuse.info/files/mimenusawasi.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ffaf6e04c---89106481430.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/93314227439.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/walano.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/metamezexidugad.pdfIn PDF document text
    • http://www.celso.org/download/kepelerifob.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/wutodilunubepopovuv.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/15525137474.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/dtm4qt5tklqsd2lf85o76o3482/betolimepuzopoxerezopib.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/64986266271.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9e2706ee3---selasubomotatosazojiz.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/vamazaxanawerufogumuvu.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/rumaminuj.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/zekerunifazagekekikan.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/d08fb3f551ac61850f1cc258615b6b2b/tatasepovagadew.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_off0000afde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F5 10916 bytes
SHA-256: dc3731293f4ccdcf68d3ba5a3c58bdff32daf88ba8de2d47fa60959f1a8c34e2
font_02_sfnt_off0000e142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 15312 bytes
SHA-256: 7c272f48cfd3ff08ca2b820b746a26d0ebd538f38d796f17ed437464252f3855

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