Malicious PDF — malware analysis report

Static analysis result for SHA-256 96296fc883c54d85…

MALICIOUS

PDF

80.4 KB Created: 2021-09-01 04:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cec55a376acace8db0a8eb1499b15ef3 SHA-1: eb16426db34d2c4c628c03000c233d8ba322e81a SHA-256: 96296fc883c54d85d32f2d570974491b38e05d30bd773a12a5bdb1187501b25e
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or trojan delivery mechanism. The document contains a link farm pointing to various domains, some of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to obscure the ultimate destination and evade detection. The primary purpose appears to be redirecting users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

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://savages.lu/imagesRTE/files/nazuravu.pdf In PDF document text
    • http://www.toeterloeh44.de/files/96742603402.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/kixike.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bb0f820a1---64814860355.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-8-24/20210824221811203108.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/277027649609c62ae9de83.pdfIn PDF document text
    • http://cudicio.it/images/file/97232345728.pdfIn PDF document text
    • http://hsiwww.com/image/files/20210623_154952.pdfIn PDF document text
    • http://remobudostol.pl/pliki/78440433559.pdfIn PDF document text
    • http://yejida.com/userfiles/file/dapaviguwod.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/7e0178a5f6cd199840c3dd5c01204259/69231001470.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/bumabidol.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/53975261931.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/besagizig.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/72693657726.pdfIn PDF document text
    • http://casaalu.com/luutru/files/26914829127.pdfIn PDF document text
    • http://chikatere.com/Upload/files/lesetinuxenunonezaporowib.pdfIn PDF document text
    • https://www.crqp.ch/ck/ckfinder/userfiles/files/96176640283.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b086827236---giruduxiperubesegilezozo.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/zewonelusodaf.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/jorerumotizerotafadudi.pdfIn PDF document text
    • https://stopserv.ru/files/file/jazazaru.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/72311901902.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/nukewulujurigasurux.pdfIn PDF document text
    • https://tch.lu/files/files/12897365301.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=spencer+list+icarlyPDF link annotation
    • 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_off0000ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 10436 bytes
SHA-256: 052c7bd3c26ec2d8fd1fea8b044680228d373e6c013e4159164c6f6051e69735
font_01_sfnt_off00010517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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