Malicious PDF — malware analysis report

Static analysis result for SHA-256 78632016cb0d4849…

MALICIOUS

PDF

86.1 KB Created: 2021-07-25 15:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b7d1cdc5e0a623893c81bac6ce7ead74 SHA-1: dfeb7852a20e54e977c6ee9e43cc03e9927162d2 SHA-256: 78632016cb0d484935a0d56e979df25086e90afa73603c6d3c41d817be4923b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/72c63da77e198e6b3e05efd5a7ad62d3/mepitufi.pdf In PDF document text
    • http://dancedynamicsla.com/clients/38740/File/80032518896.pdfIn PDF document text
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/88726517563.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883a7101032---fuvuzawaxexazil.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767fa3f306b---71724396816.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/a89q5tnnd05g8cqc6vu2o8oasu/69925654560.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/e819ff68565585ce770a804e2a6c05bb/piseveredato.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091048e0fafa---77005968535.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/15c18520713e11180e6fc40d75b0a806/pinejirigoxopifufo.pdfIn PDF document text
    • http://cosmickino.ru/sadm_files/zetamadezesumafovelixew.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/kukegaxonivoxexisumewu.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160947c8b83dd4---43562277842.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/m1iqoftv6khrdoigt98230sb0c/lorinoremo.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/xexipusurute.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/86388671461.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/59466278037.pdfIn PDF document text
    • https://led7.ru/file/29146579685.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609406fc9ee70---padowozidikeli.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/22357253214.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/34c6453d5638dad048534140a0f3d9c2/55018715403.pdfIn PDF document text
    • http://effektfilm.de/files/file/8321011622.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=what+is+indirect+coombs+test+in+hindiPDF 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_off0000ea9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9C 17724 bytes
SHA-256: 4fdf34aff3a2d726b7cd44b423367011de9a64fd22e5e6598692a25dda004666
font_01_sfnt_off0001196e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13185 10724 bytes
SHA-256: 41cae10361bcbc3b71c32503540fe84c3701b27de3ab3de628ecdad6433d3a0d

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