Malicious PDF — malware analysis report

Static analysis result for SHA-256 e385b58f0d225856…

MALICIOUS

PDF

69.2 KB Created: 2021-09-13 12:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 4f3c96b8e7f03f570c5a14ddd2686bef SHA-1: 7f8397d6e30426f53dfc6b6268e223debdd251a6 SHA-256: e385b58f0d225856f38e6ba154c64d295925cec43f79ec2ce465a10647199697
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URLs, many hosted on potentially disposable domains, suggests a phishing or credential harvesting attempt, or a distribution point for further malware. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9131

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://crysiq.ru/uplcv?utm_term=where+are+the+pictures+on+my+android PDF link annotation
    • http://szkolka-wiercioch.pl/files/file/89869107149.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/diketo.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/64833168555.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613eddb9ae624---15145854899.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/54342606558.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/50168298683.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/33751109211.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/vudakazuvupup.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/97167439381.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/74574702436.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/getumovokebipif.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/euhiqstb3hilg79tvatsqj8j22/88394486578.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/disobefekonigu.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/34742534268.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/34607495479.pdfIn PDF document text
    • https://maviet.vn/upload/files/vudowagenesixodevex.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/suwaduxalilepobebanaj.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/sokibalinajodetag.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/wakanetaxexoxopiwu.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/sezolibopobakilato.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/kipirukilobusodasisipid.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/sesomer.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/ruxogu.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/66941528364.pdfIn PDF document text
    • 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_off0000d624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD624 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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