Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc680fc9ed90004f…

MALICIOUS

PDF

75.6 KB Created: 2021-06-13 15:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6ab02937bacaffc1620bb3999084dc60 SHA-1: f3c42e0aee2d50f79a8d5af32d816d8152b50e43 SHA-256: cc680fc9ed90004f98c518906a296a9c9e5663441daaf7db9faed9bc5c539441
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The primary URL 'https://coretry.ru/uplcv?utm_term=bloons+td+6+on+pc' indicates a potential attempt to trick users into downloading a malicious file by advertising a popular game. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://coretry.ru/uplcv?utm_term=bloons+td+6+on+pc PDF link annotation
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b53cc60c072---28034683329.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/35454767126.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087230f38f28---38620180219.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/bokowegapiwaji.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/rapinuzuxaxor.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/34408351820.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7830d3d88---60948224993.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085236f55dd3---wizajijo.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vojotet.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/lm66jbdg4pv9vm2b82otv8kn44/48588375377.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/jutubituge.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/89833740089.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160789ac0d3990---20827324186.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/d2c3c09a5e4131d2c74d3116dc5394ce/jonapebuxoguzarapepap.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b20f7a768cc---61908098343.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA60 4964 bytes
SHA-256: f99ad3f80cf6ae669dd9e9b45aa7135e6fda2b3ef29056461a75868a1f84173e
font_01_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 11316 bytes
SHA-256: 9e186e71193ca6eaa7a65d18e227d438ce674656e41dcd6575056e5481f19645

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