Malicious PDF — malware analysis report

Static analysis result for SHA-256 d415102c085003c8…

MALICIOUS

PDF

72.7 KB Created: 2021-09-01 15:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 85abce16f23192cfe88254f837dc93db SHA-1: d95f2e2b051a79862ab01675261a16295d9c1ec1 SHA-256: d415102c085003c8c6d6112b820e7a767860920f2b2148c0d6261b18277151e3
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 compromised WordPress sites, likely to host further malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links to potentially compromised CMS upload directories suggests a tactic to distribute malware or facilitate phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://markzone.az/wp-content/plugins/super-forms/uploads/php/files/n1f57nblhnjq9l5lu6t2q85rpo/janebaf.pdf In PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607949b9ba8cf---ropixebagepexi.pdfIn PDF document text
    • https://everestart.com/images/stories/file/levobiwipabobobew.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160df34a86be2b---87727593640.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/nirub.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/53820237211.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/87864662965.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/wirubu.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bed732cd7cd---49234572123.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210726062834.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/pipinufoxebub.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/18919515086.pdfIn PDF document text
    • http://airfa.it/userfiles/file/bizawijoxapazov.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/kavedetixozewerojazidax.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082fd8597ab7---wazajeguvuwepasaf.pdfIn PDF document text
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/falokorivotibiwulafomibu.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/jutis.pdfIn PDF document text
    • https://limmaginebistrot.com/file/42762620826.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/63435489463.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160843e62035b1---bagaranovesitirumuj.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/tufibuwir.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3711bfb1c---segipemabusu.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/vodixonurokikezibu.pdfIn PDF document text
    • https://retta-bg.com/userfiles/84349524233.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081876c306ae---sepojewetunolisu.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/83c80e13aba08b5af134843240b2ec44/51810683188.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/romunabefizitunuzab.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/17496712420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=free+indd+to+pdf+converterPDF 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_off0000bdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5ED 10280 bytes
SHA-256: 1010e95051892a3341e7f418554c9226dcb7e36debaca85000ad6222aba44a86
font_02_sfnt_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 15780 bytes
SHA-256: 183b03649131c17ca3e8bd85f20539f21869cd87d201bbd47b1ba98c698088cb

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