Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fac477bf15fbba5…

MALICIOUS

PDF

73.4 KB Created: 2021-10-07 04:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ff590e852131ba0c6f4c2cbf8f8bc0f2 SHA-1: 92917a022b0141a9a2de69d4f4af9a38671955c9 SHA-256: 7fac477bf15fbba59637818c08579d7bf9bbb5755b930c9b494cc0ef53edba33
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code. This script likely redirects the user to one of the numerous external URLs found within the document, which are often used for phishing or to download further malicious payloads. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4886

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368f76481e6---momugufajulet.pdf In PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/22/file/20210922_005357_108.pdfIn PDF document text
    • https://bukkosdiskola.hu/files/file/xilixu.pdfIn PDF document text
    • https://bdlvn.com/steel/upload/files/4375840918.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/52242219894.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/mirubufatoba.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/miwefakurekupis.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/80810404978.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/81557993104.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/wonepexagagegowologa.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/misiwuxarasava.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/97159403527.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/derewevovuxugakoxa.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/wagodapumowapubip.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/2497106765.pdfIn PDF document text
    • https://maria-galland.ru/files/file/54179582952.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/laxixo.pdfIn PDF document text
    • http://zae.me/datafiles/file/puwomenurolasigumikapo.pdfIn PDF document text
    • http://grossbuch.com/upload/file/widoxaxikesi.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/sedibujoxadawibilebix.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/zobezatapujazozutad.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/21866954616.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1614e2049ca5d0---19542463983.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/kiwebujedop.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/4798310995.pdfIn PDF document text
    • https://zhansq.cn/upload/file/91325005486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=download+naruto+file+for+ppssppPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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