Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd1db1636a04bdd…

MALICIOUS

PDF

80.4 KB Created: 2021-08-08 21:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: ba75524095a75966d67bd65d6351670e SHA-1: 7057390cf53ddffc18c2c78c2f2f04d5056d66aa SHA-256: 3cd1db1636a04bdd8c2394112ced2a9d7658724fcd195bc6a94857e3c88e0011
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.8646

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.
  • 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://technok.cz/wp-content/plugins/super-forms/uploads/php/files/8a549c5ed32a72e88b0c48bddd6575e6/13205940849.pdf In PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9a1327df9---77442325589.pdfIn PDF document text
    • http://rld-carbon.ru/file/21823035483.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/pazidel.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/161008845189d5---4479260019.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/68189813791.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/c4c2e959a4d62bd6577a0ee02a956131/peponulupa.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/63b6478b11b470b17e0038c441cd91f7/90021185202.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/8981068fdf8afea055a07070bf0bcfd1/tepazowamepe.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac77cfd039e---zewojuridiwozajumug.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/sifojun.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/80320446078.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a9e19d192---jofewivobetumisufebejij.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/mojaver.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872c3cbf206---20199775358.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/61478542007.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f868a57c4f---61579334054.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/zuvafezalam.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/gopedanimiva.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/sevogodazuxedexorikarupav.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f87b378db---wivexuxefasapuf.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/284f169638a8c46881b38e70f0930cfb/vusorotukojotupezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+much+is+a+navien+boilerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D4 10780 bytes
SHA-256: aa112cf3f6a185811c9123d14d98597845ca8686790905294d543a069b3fcde4
font_01_sfnt_off00010c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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