Malicious PDF — malware analysis report

Static analysis result for SHA-256 742e76bef194fb35…

MALICIOUS

PDF

67.8 KB Created: 2021-09-16 10:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f5d6232b765067ffc443cc3590b514d7 SHA-1: dd1089f3acd40e1ab2835d133175786c15002081 SHA-256: 742e76bef194fb35e614722aba36412876e924cd125240c77d8b862a3f8ee991
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic analysis revealed it functions as a link farm, directing users to numerous distinct domains, which is a common tactic for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users by redirecting them to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6824

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://fazekaskozpont.hu/images/upload/file/77433432869.pdf In PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbbc0578c5---gawijebivojiz.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/wotidisevuwijulijuwevuto.pdfIn PDF document text
    • http://ocvitlucky.com/vietkiendo/upload/file/wubemewawijizodujaxurun.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/sajuxuwoxejumufovelafit.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/wanexizusazuv.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/vuxovekuvuwid.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/5234306130.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/24561582105.pdfIn PDF document text
    • http://parentini.it/userfiles/files/lobujotulixulotarix.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/gisufiritijod.pdfIn PDF document text
    • http://8njl.com/userfiles/files/4467030109.pdfIn PDF document text
    • http://hjhchem.com/upload/files/33520047418.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/nodamareduj.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/niborimogabepivezasix.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/safebomiritoxemidi.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/vegorozu.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/jogum.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29694119378.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/8049736277.pdfIn PDF document text
    • http://446888.top/userfiles/file/lofulunoluberujejegilepu.pdfIn PDF document text
    • https://spyboarcams.com/files/98657187179.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/2051108984.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/gofojizofived.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16142a64f7442b---bafevimikir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=connect+android+phone+to+laptop+wirelesslyPDF 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_off0000deb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 10844 bytes
SHA-256: e831d6952ba0d79ced69198042d94c270b78335d389c736bfb6c68ed1fa0670f