Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fa3ed04a92b00e…

MALICIOUS

PDF

76.8 KB Created: 2021-09-23 20:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 4451a8a4c2cbfc97b92ce7f278ab04bb SHA-1: d5211c38df862705eee27ace79496189001b92d2 SHA-256: 67fa3ed04a92b00e9734386f08005d9def0a8268e89b030a62acb7474a0b743c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous embedded URLs pointing to a link farm, a common technique for distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

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 http://kachelofen-prommegger.at/fotubevupiloparanudedowal.pdf In PDF document text
    • http://bannhuaduong.net/upload/files/90683886948.pdfIn PDF document text
    • http://ukkies.be/userfiles/file/13747194036.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3dede30dc---63979161182.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/83342391835.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/96458553132.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/tifopizosoki.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/82644041331.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/69480357984.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/xafitufot.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/68960962894.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/30678321021.pdfIn PDF document text
    • https://brs.jo/userfiles/files/najazodozefufawugavijov.pdfIn PDF document text
    • http://taociren.com/upload/file/21090807283507200215pct0wy9j70.pdfIn PDF document text
    • https://gencatakan.com/upload/file/tazuwisolakix.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/dagugevofasinudolukizu.pdfIn PDF document text
    • https://superpackeg.com/userfiles/file/75888048886.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/29146183469.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-14/20210914182536973286.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/didopenezolijuzurigujuju.pdfIn PDF document text
    • http://chanhbon.vn/media/ftp/file/80498936741.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/zabuxotojikebomojovim.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/60427451067.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/bupiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=car+crash+simulation+gamePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB70 10808 bytes
SHA-256: a23786d857cc19081c7ee8b2b73803a17134bae2978214e19514abe0a0963e8c
font_01_sfnt_off0000f43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4F 17720 bytes
SHA-256: b17eb5dd99ed9b8dd8099d07810f531212fad9c8d609303a2dc414d5ab21d37d

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