Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2cf0d14b4a46ef…

MALICIOUS

PDF

86.0 KB Created: 2021-09-12 19:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: c7d8c5436225587e628546bec1c685bd SHA-1: be0880e1b037c3532f7db5dcbd85f8c7e29d6c9d SHA-256: 9d2cf0d14b4a46effb32c2d7869eff72dc48ec052840f2e65db584c43e2e1b9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also indicated a high probability of maliciousness. No scripts were extracted, but the presence of multiple suspicious URLs strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5549

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 https://crysiq.ru/uplcv?utm_term=tintin+red+sea+sharks+pdf PDF link annotation
    • https://maritime-models.com/userfiles/file/xisamixadevufuwuzenor.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/pevogikerip.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/jasivezigudewisukarisugo.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/94706374876.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/95762849533.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/vewogekokaxetilexubi.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cde3aa475b---24349999751.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/rolinizavepuwuwem.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ee5bc0c37---36494741185.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/zomolepesevupux.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/jibowuvokolux.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/neruparal.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/fuliwexagixoler.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/12612367196.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/15243884105.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/9tod15bc15ci576n16pi1vob8l/xulevipepowoma.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vimovelatavalitide.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/66c61c257e593d94801c12ddc0ec2260/84826169483.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/tokipukavegeg.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/87173831471.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/73024185242.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 19316 bytes
SHA-256: 60e097e96cdb3b5b1d1e049c2b1ad401a8ab1242f6d688b047e93b3f0a13adbd
font_01_sfnt_off00012a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000142a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A9 10484 bytes
SHA-256: ae4dee9be9a0829af67e420593858a8d26ab9c37e020d714ffc96b43c7c42f77

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