Malicious PDF — malware analysis report

Static analysis result for SHA-256 8452051e0706da2e…

MALICIOUS

PDF

96.0 KB Created: 2021-09-10 00:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1586dc60670b4b314e263b3a226bf12a SHA-1: c34740d7b09c516edf727fec6ad75fffb9ccdf47 SHA-256: 8452051e0706da2e10e04d3caee7f0f8e4333ef571992b62855824cea5801aa6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs that point to various domains, suggesting a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6805

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 http://phutungquanghieu.com/app/webroot/files/ckfinder/files/tirivufelakata.pdf In PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/52796419241.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/65529266733.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/mifuzukorokidosekotejipi.pdfIn PDF document text
    • http://www.motocams.cz/ckfinder/userfiles/files/6035004411.pdfIn PDF document text
    • https://akconta.com/uploads/files/61912518075.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/tovirafevexajowanuponeli.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/vetejetajemolu.pdfIn PDF document text
    • http://csp.hu/editor_up/16975839845.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109061600246268.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/siwonaxifesofonun.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/69435811608.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/wirakepimujanizeve.pdfIn PDF document text
    • http://tnslib.su/userfiles/files/luvinotiniro.pdfIn PDF document text
    • https://angkalaris.com/contents/files/67295722874.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xedebovakogilebugapanid.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/78546184997.pdfIn PDF document text
    • http://dinhvi5s.com/images/newtech/files/16107588868.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/98708479622.pdfIn PDF document text
    • http://consade.com/userfiles/file/marolefo.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161310b678fb0b---lelekoxezidodiledumedusa.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/getifurazuvufaxijur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=optional+pricing+strategyPDF link annotation
    • 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_off00014475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14475 10688 bytes
SHA-256: 79f99f066fe253fe1fd99b59ef582ec7c15fc92a944b7a4178302a1bda4aa2bd

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