Malicious PDF — malware analysis report

Static analysis result for SHA-256 392efc2c33942006…

MALICIOUS

PDF

86.2 KB Created: 2021-07-04 20:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 18ba1fa723287abcc81c681c0ba4776c SHA-1: 024b1832b1e05198d02168b03e1b79921d099084 SHA-256: 392efc2c3394200669a1031c70730399581957b3f23981cfa2a6966426b1dce6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, specifically targeting WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure suggests a link farm designed to redirect users to malicious content, likely a phishing lure or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085d8563ce63---79227028783.pdf In PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6d2048fd59547ae0c5731f0fb76a8a9f/jusasufaruzusevatewabedig.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160847f37989da---45361620244.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/vuwuzalobazewele.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/72543842856.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-20/20210620084352227908.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/basixisuvigegudigere.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ed31017e5---tabama.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/r9eb8ebqo6oqkjj5i3tq60s6d2/24030420686.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/pobivuge.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/2d03a272080ddcf8ef6bb5b359f77204/82790152627.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/f73acfd10993a113e2f2d865b5ee3ea7/82465572182.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/375dfa102a46254cf169fe7e5d8641a2/muvuwidawitebal.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d086f4c4790---80976008000.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/82157173726.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/rasuvoxig.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/a4827d1a3f60b839fdf72a0470ca279b/17599200398.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/varotub.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16221304785872.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/juvedodukagi.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/jibopuj.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160713efdeb904---kozavuxejisegadid.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16083f157c135a---dabajefugagovezew.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/lanetavafudupanamakorom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+apologize+and+make+amendsPDF 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_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 16436 bytes
SHA-256: e1793059f818012487a7e94b7329ea6804cbb881e0997502cb65ea30370feabc
font_01_sfnt_off000118b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C8 10864 bytes
SHA-256: 46dfbaf4e407e66dad8b5814d5e54ca6e4adf08f089b712a87e19ee9ba59bb30