Malicious PDF — malware analysis report

Static analysis result for SHA-256 32463fbfa3600852…

MALICIOUS

PDF

89.0 KB Created: 2021-06-23 20:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6e63b6a01205d8adc77abd049ffb892c SHA-1: 150c6ed6a8051b1e745be6c2711367adb4bfdc2c SHA-256: 32463fbfa360085287d5b31f3e4accb2d4bb7f0a9ee6b1b32b4cf975aee1a61a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/95dd86c49ae5e6683ed2263ab82860a3/14377998960.pdf In PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea5cd3f8e0---pigelu.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160baffae70a63---70539032107.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/11356884792.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608264b414497---nevamawerupogekapu.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/15846246402.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f1a67273c---gariz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbd6484e14---burixejewuxogexu.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/69253528089.pdfIn PDF document text
    • https://puntoagricoltura.it/file/pexaporegab.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/puvimilerokidujo.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/c74382fd345a17e086ebff16bc7a88cb/guvov.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/d1841375cf6a4c09b2a4e79f137e9a30/42176469713.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/45740674420.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=conversion+fichier+pdf+en+excel+gratuitPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1effaa506e9c2a0255020790025ae563/dafodeti.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85F 6512 bytes
SHA-256: 61e6a85bcfbbf35c76dad43ef57950ee5ffc4645e289d85d9185931be07e0435
font_01_sfnt_off000108a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A8 5448 bytes
SHA-256: dc22796fa137ef313cce90b9db259ef5a23fc5e048c4197623772dcd29b80a36
font_02_sfnt_off00011b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B39 11944 bytes
SHA-256: 6d8c0556537eff1529cedd5a21df0e51e2450aa525f97ae6350dfa09e9f1781f
font_03_sfnt_off00014139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14139 16148 bytes
SHA-256: 51babe3b44e703ca5a92278b053c112c5c116674d3b708c8e2cb3e4aa6bd9a04

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