Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d96dcbd1ec9d713…

MALICIOUS

PDF

80.0 KB Created: 2021-06-23 01:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e67c7381a7e4a1165f293b8cc65daff5 SHA-1: 92ea9e9faf9ad35e3f36c57c058d3ae23df9eaad SHA-256: 2d96dcbd1ec9d7131001cee5cee197f0da05147260f34d3ce267835c7e7c052a
164 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF viewers or delivering malicious content. The PDF also contains numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/rut2i4h1r2t8r20e42b90eh3an/gifudipomozow.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608549b15bffa---52333871514.pdf
    • http://xedaptap.net/userfiles/file/gamurigojefesobowitunozu.pdf
    • http://osc-pribor.ru/products_pictures/file/xenow.pdf
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/kazotil.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/391f5c053bd48c12c69005547e35626e/fivaxakilirunozusuna.pdf
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/zejokixakolug.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/2k19ne16crh7cjet3e7ldojiil/59821357463.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/f3a6b6fdf64a394aaaa05302d1530931/lisunivexisomosozevuzub.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/3ca483db5407b0edb8e28d541bb381f5/medopow.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1a6b5ce35---zomurufadoxitowakoxal.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/95fdd5c198b50b8e55972d086514bec7/soleguxufinololele.pdf
    • https://carlojans.com/cms/file/toreserilitedim.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160abdc0fa83b4---ketalafamexinufevit.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e5a6e42dd---rixame.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/aktd5eh830k68k1ehsba1ijo9s/51117513652.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+see+answers+on+instagram+questions
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1a.bin
113d7e04fced60ebd79ca06b551f3d144d9fdea07ab42a5946f59db722b7e1c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 5152 bytes
font_01_sfnt_off0000fb8c.bin
3c69afb155649311f1a865076cc59e0921fa737eb4d6f3997e2bd57798e20ed7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 5468 bytes
font_02_sfnt_off00010a4f.bin
86f6602537baa8f8652bd6eb1a5bf35fc7c695a79d6ebe19bba341474eabc25a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4F 11792 bytes