Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a748f48f1e416b…

MALICIOUS

PDF

115.1 KB Created: 2021-06-12 13:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2059b75e074cf96c190838d720ca1b8c SHA-1: 21302db2c9d1368943e45258ca7468e27da83b48 SHA-256: b9a748f48f1e416bf5bdd8f8b7d19d0e6bed616049832cafb688d1cbdc72e445
154 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 0.8896

Heuristics 5

  • 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
  • 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=rapidex+english+speaking+book+marathi+pdf PDF link annotation
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/44c983321161028acc53df443462d579/45626981899.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082453e875f6---33469897026.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/kd4a7e67naff697os8if3st7s4/58593312924.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af43c878b29---36903333179.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ab3ef333c6428f4e5e89fc1ba207c343/30691860839.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b521451eb00---44403917043.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/damej.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/57548227059.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/nccft9lv5rdavs63a1v53aust9/20537517702.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160962f7ead79d---fitujitobigugegadiki.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac0916fd58---retebeduvupewebadanozi.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/0j7kmjb5hn1rugbmhvs0q6pc1s/38460190981.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/10695141772.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/pivelo.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/97306307414.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://mediaget.com/userfiles/files/3796641119.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B77 5732 bytes
SHA-256: 3ff6558de9aae021a3385cc81b37b6cfd6b53ef8ef180fccd5a9843efbf09509
font_01_sfnt_off00019ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19ED5 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0001aa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA39 11160 bytes
SHA-256: 69163663a0e37980c624542f245dc8a21e0eefbba5f51ce390e96e1c27978714

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