Malicious PDF — malware analysis report

Static analysis result for SHA-256 66520ba54e594915…

MALICIOUS

PDF

73.4 KB Created: 2021-09-16 05:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ad890f84e0e2b9366835ac97c47537f5 SHA-1: 4ba32c9da9e4d913ed7de6d4928ec1829a82062f SHA-256: 66520ba54e59491519ea9b4aa44378a49c1c721406e4c4acc5e904f83a48f548
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is identified as a link farm. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5898

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://speakingparrot.com/upload/ckfinder/files/85569279270.pdf In PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/moruvekusonosabipid.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/tixarumara.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/pulovuriti.pdfIn PDF document text
    • https://bunianco.com/other_files/File/26302449858.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lajalumakenu.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/90801897742.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/jijixadevela.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/bedizikolegifuxak.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/xudebofavofitusibipigopav.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/segoputevijom.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/nazusuziwekej.pdfIn PDF document text
    • https://phm.vn/upload/files/wixowiradozuzan.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/41840936393.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/74595677718.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/tokiset.pdfIn PDF document text
    • http://patrickstaxi.fr/userfiles/file/rusexodu.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/ronudojezuxavavawa.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/puwijadagujivuzowalo.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/77002182023.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/vosanikimulemuzotoduragof.pdfIn PDF document text
    • https://mytshirtcreator.com/app/webroot/files/file/74757938346.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/mobusepedus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=free+android+to+pc+mirrorPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE062 10440 bytes
SHA-256: 54ed7a8cde27736bda4ecf59fe7fc555327ea114452c0992baec3a8564c87b27
font_01_sfnt_off0000f7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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