Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54b50cf50e4f915…

MALICIOUS

PDF

63.6 KB Created: 2021-06-09 22:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 92780b674ad1d8bd3e059bca4935c097 SHA-1: 3a022e7e70c4609a54e3ac24ffc8b4bc5d221a7c SHA-256: b54b50cf50e4f915d71270211f210fef64f0698a7e11b932b0117e451de12f0a
174 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute phishing content or further malware. The document body, though heavily obfuscated, contains strings related to music and application versions, which may be used as lures or to disguise the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://ketchas.ru/uplcv?utm_term=mohabbat+dil+ka+sakoon+hai+aitbaar+mp3 PDF link annotation
    • https://telewebmarketing.com/FCKeditor/file/lobokunujesisarivurup.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/titotebodedusapunoxanuzop.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/7vgq85emkhqa5kp6192binvpg7/nanoxudokikebatep.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/12778855756.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/6df6b8e6d6e647af13a0d64b5163458b/1245653922.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becff255d43---depurosanuriweluje.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/4ae993f03a7aa00fde6499c2fd2179eb/45000457186.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/eb6c11bf65e03a40167f58e8eb9648d6/22592346328.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/6d32a40f80cb150026f9d01d95e66683/94914448854.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f96f1acec---32595813500.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/doguvukoj.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8e0e68441---vekevepej.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160839c576fb74---giluvefuti.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f904f35076---watudasatapapote.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c823aa6073---69725443327.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/vupaxivupufeluxeme.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd87c5cd158---xuwetuvoretawegageku.pdfPDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46C 5572 bytes
SHA-256: 6c6bcd8e32622135463317c9218d1b9635b0df138b629503ab1372921529082a

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