Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d0d55b445116c0…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 03:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bd1d2bdec181cd3687494be7b9577d28 SHA-1: b632ef61b0841773313ea84a4c0249e5191bbee9 SHA-256: f3d0d55b445116c061140320a9977c2928d16b8133fe3ff180e526a0b76b5564
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable hosting, likely to lure users into clicking malicious links. The presence of these links and the detection by security tools strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://kasystemofkarate.com/clients/861259/File/xekenovowefo.pdf In PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a60f71c9c79---garudevurukexi.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/04d879gt31vl0s893o235g4ia9/11285053020.pdfIn PDF document text
    • http://klhl.com/userfiles/file/sivifebilovupadekuxiw.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/24995439011.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/14412995297.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128a5f21c8c1---10240697648.pdfIn PDF document text
    • http://mileschapelcme.org/clients/9/9b/9b85db73e8c1d5ae3bc18b6db4f26039/File/16741453803.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c775f2ba9f8---45688704496.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/rkm3oco3kakuk3c5a08iq432honoh41f/8737656654.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/k1kck245m47sb4hd5lbjc0cf3d/sesosejogo.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/30100600522.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611784d06c56a---feserajit.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/29393193675.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/kozurerogafevobifot.pdfIn PDF document text
    • http://mousike.it/img_ins/files/bawafutekegekemosopuz.pdfIn PDF document text
    • http://186086.com/upload/files/tidosarajefipodu.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/31937796378.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/sofurirow.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a937ba288cf---67947410234.pdfIn PDF document text
    • http://yeditepegumruk.com/userfiles/13447539729.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/53542da1d393bfebd56a86317217fe64/41157608815.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/351cba8678933f4769d4077d2b7ce7d5/65885171575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+captive+prince+read+onlinePDF 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_off0000e165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE165 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97C 10472 bytes
SHA-256: 5687ca3367f5cbee8b7d2bcf655a5224a476e7d42ba1e63fcbc7d63d678f928f
font_02_sfnt_off00011135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11135 18000 bytes
SHA-256: edeedc7da5372954795e14918e8e5e929e935c6601b5e96476865098d93bfca6

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