Malicious PDF — malware analysis report

Static analysis result for SHA-256 34709a1173c31562…

MALICIOUS

PDF

54.6 KB Created: 2021-09-20 16:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5b8744da0982264cb72e0c3667ce3d2 SHA-1: abc0ca6ade88cf9797a4817fcbefb78cc6fd16b7 SHA-256: 34709a1173c315625d48feb1c97ddc0b6145c13c9999281f752763ab75543db5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to various domains, some of which are hosted on compromised CMS platforms. The ML classifier also indicated a high probability of maliciousness. The presence of numerous external links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8265

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 http://degeninhotel.ru/admin/ckfinder/userfiles/files/xixowavemagenulolumidigu.pdf
    • http://ktcz.eu/files/files/sawezupevavikisupowiw.pdf
    • https://oklogistic.lv/upload/file/suwufolixeruzaxup.pdf
    • http://satcomlink.com/userData/board/file/86718533331.pdf
    • http://cistenivytahu.cz/upload/file/60225831332.pdf
    • https://patriciobanados.cl/upload/file/
    • http://ilyxrace.com/userfiles/files/70947800998.pdf
    • https://hearing-outlet.com/uploads/files/202109101515566275.pdf
    • http://ms-krmelin.cz/app/webroot/files/files/tekavaser.pdf
    • https://nidi.mk/ckfinder/userfiles/files/79753160722.pdf
    • https://thietkeweblongan.com/upload/files/81254555775.pdf
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/45270269461.pdf
    • https://responsible-tourism-alliance.com/content_file/files/zomosokiv.pdf
    • http://michellenevinracing.com/FCKeditor/file/nejofazogawo.pdf
    • http://unicorn-furnitures.com/d/files/8452143517.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c20a1e6bde---54499331297.pdf
    • http://gpsputhuppally.com/userfiles/file/vedikoxo.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/2662e14e3586a46cdbf459c775c546c0/vugawakijen.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/8d66aa2cfe4c4d280e16e18d5f7b9b3b/zufijapivakanefapi.pdf
    • http://graciaindoutama.com/kingkong/userfiles/files/fozar.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161358487a3b9f---77770819242.pdf
    • http://avvolodin.ru/upload/file/vagetiroferad.pdf
    • https://grandhotelbulgaria.com/userfiles/file/gojelitizu.pdf
    • http://pointerboards.com/uploads/admin/files/tixadodujukapu.pdf
    • https://e-room.co/userfiles/file/wefabivalepemulirezagi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=get+to+the+rescue+paw+patrol
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b441.bin
f0cddf9e5a737b1645056395bb2e269e1561fcf76326f53eda6c2b7cdd8832b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB441 10500 bytes

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