Malicious PDF — malware analysis report

Static analysis result for SHA-256 422d11715f2a4ae9…

MALICIOUS

PDF

117.2 KB Created: 2021-06-23 20:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8c031e29708122af4cfea80da78ce20c SHA-1: ec26f572b2628354b8472f848720e6b1dc67a2ec SHA-256: 422d11715f2a4ae9148fe89f636118b5d0a2c8cf2c2009a866766c63f4cad9ee
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 appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://chcial.ru/uplcv?utm_term=atomic+habits+pdf+github PDF link annotation
    • http://videofilm-tv.ru/content/File/57619548327.pdfIn PDF document text
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/vuluwiberiputi.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/95a9cc55c7c8135d9f9037c34fa5b4b5/410458201.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/elb1rvrqnc0s6lik6ho671sk53/mekisidelebijonoxi.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/fb1049d90726e959cadb3d3c451aab57/xonep.pdfIn PDF document text
    • https://signika.pl/Upload/file/veturabuz.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/69897195332.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/novulibapuzeme.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06ee54e58e---pakopijuwo.pdfIn PDF document text
    • https://kildevangen.dk/files/71044055212.pdfIn PDF document text
    • https://xistenze.com/files/files/61531045459.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca3b0c7c9e---70391092729.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/ec0a957ecbb1e3102312537daf17dc88/27205608671.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f07dc80222---42282233526.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608229097cd22---75830624469.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16099aa37652f8---sizogipetuf.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6b3642dde8b4a1bed71ccce53254323c/56711613877.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/fb287c5f1c17f4ef6ead86782ff3fe97/10877808099.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
    • 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_off00012aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA0 5572 bytes
SHA-256: c896bd2d4ff219ae8b026f31743330cb923ed4c44c203e4def20903f185c833c
font_01_sfnt_off00013d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D65 25364 bytes
SHA-256: f94e1dbd54e9880e99db04503273a38d59894a8b3dff9e64b77334361e798869
font_02_sfnt_off0001883f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1883F 10848 bytes
SHA-256: dd3471883a785eae2a569a30e8a9433d3c6f98239520b84d035b6a8bd301803f
font_03_sfnt_off0001ad7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD7C 17312 bytes
SHA-256: 1bbd6588dd4c71b5cbe5d868628e66ee38c90ef91aa8badc86fac5291714cb1c

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