Malicious PDF — malware analysis report

Static analysis result for SHA-256 9276d0627b55faa1…

MALICIOUS

PDF

77.6 KB Created: 2021-09-13 11:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 62b0bd17da7b33aa9c186deba33df20c SHA-1: cd9d14c37addd5768c41ade9b4e4a290a0b6caa8 SHA-256: 9276d0627b55faa19fdd32427a0c8ea89cedf46382a262290bd37d906255cc08
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to disposable hosting and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5190

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 https://pixomot.ru/uplcv?utm_term=package+disabler+pro+samsung+apk+free PDF link annotation
    • http://jayeonrak.com/upfile_editor/2021/files/zekopu.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/72695981536.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/duvifisu.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/sojavopama.pdfIn PDF document text
    • http://canoto.us/Images_upload/files/56739448332.pdfIn PDF document text
    • http://fractinvest.com/uploads/file/puxitovemunep.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/87653667100.pdfIn PDF document text
    • https://xcheck.vn/uploads/userfiles/file/4749201152.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/suzexesozidaxevidivozelo.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109101206052522.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/pukumujogibudawusilizafe.pdfIn PDF document text
    • http://trivio.it/userfiles/files/wubirerevel.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210904_140039.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/dujeruretukudisufudav.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/49844386160.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/pedojutizavogebafu.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/12173838122.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/d33467c51312a6bc24d6824fd40a7a4f/31841712621.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/pexipirukebawofofezola.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/43452459638.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/21837028631.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec3e0cf067---ruremikorefigajetupeniwe.pdfIn PDF document text
    • 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_off0000dacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DD 19944 bytes
SHA-256: f1644072c16d4b1c99872923ce1cc228cc339c4e676d2524801511bef5be3c51

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