Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e97b6858b87ce6d…

MALICIOUS

PDF

69.6 KB Created: 2021-09-16 09:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 88c53378b03d40e35540c37e24ef7384 SHA-1: caa2275108ddd42ba85090af9b39dead042d07ac SHA-256: 0e97b6858b87ce6d63558bce77fd10e6b9fbdeb1a943029a21fe498eb55df52a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be redirecting users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6634

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://alfavit.tv/userfiles/file/zipexo.pdf In PDF document text
    • https://medbioplast.com/klucharnet/images/file/wosomexorewipepixalorin.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcdbd956e4---gedusepodere.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/8313090183.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/58019164950.pdfIn PDF document text
    • http://tfforming.ru/d/files/17459014343.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/muboporavutegavewib.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/90919877530.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613996783e6e0---1790278185.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/xofirodelorukitutawiru.pdfIn PDF document text
    • https://tonitomov.com/picture/file/wajekodakomizam.pdfIn PDF document text
    • https://xebecdesign.com/xebec/userfiles/file/zijefefi.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/86687070930.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/16504150101.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/xibimabulim.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/5qbo7ob4u17pe8et0qb1ien13p/5653364039.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/limikafanamiza.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/xazisupobirapetefo.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0519e40cd---77285241865.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/1433182808.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210903_3C6E1E2E58BB5BDF.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/47794603465.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/87319365008.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=hunter+x+hunter+yorknew+arcPDF 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_off0000ce11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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