Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffea47f2c4902b4c…

MALICIOUS

PDF

262.5 KB Created: 2021-06-09 22:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 33e2995f7536de427fa1e2f047bedfa3 SHA-1: 267a50c6a6cadc405988a07183fbedd9dd9ffdab SHA-256: ffea47f2c4902b4cc013ccc29860552bc464cd1174a1a108379676c6644640d6
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 https://drafthe.ru/uplcv?utm_term=histaminum+muriaticum+materia+medica PDF link annotation
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3c40a07bc---bateluzoj.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a27a51b5f---62337499222.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081638e57001---fibisutiteziv.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/99589041281.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/8cf5l4f2gm86l95d12behguovv/76069052566.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a5d3ba1cf---85716919886.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d848dcde4---kinugejudovo.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/p3hifj04eg1eum27qn4pag91s5/baxadege.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b715ac311---wiwozezamabofizopu.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/c7805c291d0d47e92a0a2276f03cf5fd/tamadutofaxibetidexutosum.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/lvuldt86pto6glptico4dna9a7/82185047886.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bf1a85b60---19996747311.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/219bdd5c1084050abf54b691f75bdfca/26518083576.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8168851449---40042086787.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b097cb2d377---tidozubovixelejetewit.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0e9999312---51438729952.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_off0003889e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3889E 9008 bytes
SHA-256: dc7d565f4ae96d62c9b5e5526334931156c8c3e6912bf7e0b868791f2db01640
font_01_sfnt_off0003a5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A5AC 5016 bytes
SHA-256: e0fec8d0a39e372afe2709fbcfcc3564f317f6b06edc4f8589880d6bf7f594c2
font_02_sfnt_off0003b69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B69B 20436 bytes
SHA-256: c40287e795d219a12d518d8bfc62a10f2aa931ebf39c228c5a1e391492ceacac
font_03_sfnt_off0003f45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F45B 16232 bytes
SHA-256: 90063111fd84fc9d3bbe0e91a25c30074b178549c4c86487e0bfae44fa44017a