Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a156967a40db143…

MALICIOUS

PDF

70.4 KB Created: 2021-09-20 07:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7d4acb8cf4fcf532efeae2d0e5ade732 SHA-1: e1bdc8d21bca897a433eac5793017f4e5f486f91 SHA-256: 3a156967a40db143f78e2bcd9907da3647d82f79cc9cab01895b492000eb7bfb
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are structured as link farms with UTM parameters, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6613

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://irlanc.ru/uplcv?utm_term=after+we+collided+watch+full+movie+for+free PDF link annotation
    • http://f-kcc.jp/user_data/userfiles/files/mabojuxo.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/a3791daf8c52c03b3317bf0549680310/29471821543.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/ponoladep.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/50860121557.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/vonado.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/70636978401.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/50800124479.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/zasisaninidagob.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210918105623.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/xatenezinewuzilofakiwi.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/34147571982.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/9651318903.pdfIn PDF document text
    • http://kgmda.com/upload/files/26794155284.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210910215331_ejzxxz.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/xitutifepexagep.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/64138294991.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/23414514010.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/ripoja.pdfIn PDF document text
    • http://tradotel-riviera.com/file/fojepi.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ed12d937b---welomekuzuledofibewetola.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/jawibabexidimimozez.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/mabegotevixezore.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/75447225082.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/vapodaf.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_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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