Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec0d972207f5864…

MALICIOUS

PDF

69.3 KB Created: 2021-09-18 21:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: af41d91c6f4bdbec027459d4e2962180 SHA-1: 76ee36dc9eb84bcdd3cde745fc055373924faffd SHA-256: eec0d972207f58648ad0f01b7232f5cb1685f493c72698528d6a3c924fd47246
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to various download sites. The ClamAV detection and the heuristic identifying it as a link farm on disposable hosting strongly suggest a phishing or malware distribution attempt. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3555

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://lambanghieuquangcaogiare.net/vietkiendo/upload/file/wasekerebusolewema.pdf In PDF document text
    • http://twtqedu.com/userData/ebizro_board/file/50311055616.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/36357636805.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/20049742442.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/4855271405.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/52667025368.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/bupuf.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210904_120243.pdfIn PDF document text
    • http://strandedtattoo.com/file/wolewebemulifuxujus.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/63923681077.pdfIn PDF document text
    • https://blv.by/upload/editor/files/44058125001.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/jofomijowejixo.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/vigewubusanelituwa.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/vuteripifulow.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/19135546090.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/xosejunedadojulevipupox.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210913072033.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/jazitiwakefi.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/90217801246.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/xawerelexonosu.pdfIn PDF document text
    • http://zeci.nl/im/image/55016331699.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/65333104246.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/83806979983.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/suburiverodig.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16135b02fded6d---25874589950.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134a944436d7---wanemetofijusitebivarite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=minecraft+all+version+apk+downloadPDF 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_off0000c07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC07B 16176 bytes
SHA-256: 6f5fc324fbde7e7aaafe17d78bac5b9acd2ea04dfdbce19fd5d5e5fd0f388e90
font_01_sfnt_off0000e9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D3 10848 bytes
SHA-256: 641a6f739aba6e53aa62191717ed33dd5747fc1927d9b4cc77b4de1a8d6e50e9