Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22b907e82f4df61…

MALICIOUS

PDF

85.3 KB Created: 2021-09-11 21:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: df409fb61296cb11b1f949365bb26f08 SHA-1: 9510c8c26ea0d59f6d01b0b764c743a177951046 SHA-256: e22b907e82f4df615186cfea29f7802575dad2d4891aa957071bd290422ead0e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and exhibits characteristics of a link farm, with numerous external URIs pointing to disposable hosting. The embedded URLs likely serve as lures for phishing or to download further malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3119

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://medvor.ru/uplcv?utm_term=garena+free+fire+mod+apk+unlimited+diamonds PDF link annotation
    • https://pointvirgule.ca/upload/editor/file/41407284863.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0457bb183---76015244385.pdfIn PDF document text
    • https://thegmsbihta.in/userfiles/file/wosonuz.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/mipuwepezajotirilomanok.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136bafc09256---45620741491.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/72456212314.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/tapiwewosiwajej.pdfIn PDF document text
    • http://espokebar.com/uploads/files/53755874167.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/kixiso.pdfIn PDF document text
    • https://ccichn.vn/data/upload/file/25287950700.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/67794148979.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/44875364532.pdfIn PDF document text
    • http://evola.it/userfiles/files/defegute.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/bajugulowezekubuleluzuz.pdfIn PDF document text
    • http://reedxtrainternational.com/uploads/pages/file/vakojo.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/94166849178.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/91074421504.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/fiwan.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/piliwaruxukojudal.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/84459517340.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/jovubevipej.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/67655882240.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/15447431075.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/49153522217.pdfIn PDF document text
    • https://majubesar.net/contents/files/rixejin.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_off00010eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CD 10892 bytes
SHA-256: f52e83f2867c797a6a2b2e594803de809ec4baa5dbeb5fcf012ee7fc2fad6d16

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