Malicious PDF — malware analysis report

Static analysis result for SHA-256 3148242a34305473…

MALICIOUS

PDF

229.6 KB Created: 2021-08-17 08:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ea537e691a07aebf725cdfe85a170e8c SHA-1: d690b44b8663d91146e3542fd57178ebe2c828bf SHA-256: 3148242a343054733e687f2a12bc3a2ac0209ad2b0a5dcabfa4e4a8aad1c8a75
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to external PDFs, many hosted on compromised WordPress sites, suggesting a phishing lure to download further malicious content. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9831

Heuristics 5

  • 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.
  • 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 http://sns-russia.ru/userfiles/file/fekesoro.pdf In PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/6055123904.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/24618432580.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/50b92fd834d05929c4c68bfe20dfa734/39932910568.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/57948456407.pdfIn PDF document text
    • http://veivel.com/userfiles/file/5274792107.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/sasaki.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/e90ae268b4a26a05a67c7df2cbc84aac/tatevitesukovalurad.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9752439e20---fazajadivodobulilojuf.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/letuzomokumemida.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d82722780c---mabisijudale.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/mojaredulo.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/97287884759.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/gifogipositupefama.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/dibeged.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/83240376438.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610987611d13b---jezuvosadugen.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161177a22afc19---89513554120.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/29fd499a67a88d835cbdf8cd69b38fdd/sofubonewufurorajifewovik.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/1e0098c97e14c6eaf4b2c502c524867b/vozokizibutumit.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/lebilubefafilubugow.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a210c883206---mumoxixojafagi.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/n941h8hmtjcn3rtmku2qvfj7r7/69087993380.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/bipozinu.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/tobigesol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=bhagavad+gita+malayalam+meaning+pdfPDF 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_off00031edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EDD 22400 bytes
SHA-256: 43bbb8e445cd823d027f9b4f5f186ea553fa9897057bd5b1ef2b5c2c706c7eaf
font_01_sfnt_off0003551f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3551F 10788 bytes
SHA-256: 362fd34e76313071c8720cb7bfd7f5e73b3780764e44c39ffc74b71775078602
font_02_sfnt_off00036d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36D98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1