Malicious PDF — malware analysis report

Static analysis result for SHA-256 096008cde6f4d852…

MALICIOUS

PDF

63.7 KB Created: 2021-10-04 05:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8350875d52f5370465ce5f84c59b2e77 SHA-1: 4d31631da6cf0dabf062388ac6c390e9a50ebc70 SHA-256: 096008cde6f4d852834014e413cf9a03f9788f255d21313291530303dcbaa36f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV. Static analysis revealed it functions as a link farm, containing numerous external URIs pointing to disposable hosting. The PDF's structure and embedded links suggest an attempt to lure users to potentially malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=remove+vocals+from+audio+online+free PDF link annotation
    • http://csc0898.com/userfiles/file/20210907014909_vl8vac.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/43227364232.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/49381335608.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/98312500813.pdfIn PDF document text
    • http://fikszo-whc.com/userfiles/files/56409641843.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/nenapupirekamibuvi.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/liwilasibojenemolezusuw.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/31096733546.pdfIn PDF document text
    • http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/zoladirenexudos.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/0154d281b34eddb1a3472e894a27ab3a/ranizigupipe.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/gusoj.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/posavev.pdfIn PDF document text
    • https://ratodua.com/contents/files/64338033685.pdfIn PDF document text
    • https://austarpharma.com/upload/files/73268087712.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/3124563618.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/36248212269.pdfIn PDF document text
    • http://kvrhousing.com/uploads/23771281339.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/12373202395.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/12972777621.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/wudig.pdfIn PDF document text
    • http://esipro.be/userfiles/file/lenegobizo.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/89192963453.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/wovilutosurulugexojif.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_off0000b071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB071 15004 bytes
SHA-256: af50cc899835fb6fb892e54cd87a07400422fd358a47735712bbcabde71457f5
font_01_sfnt_off0000d658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD658 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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