Malicious PDF — malware analysis report

Static analysis result for SHA-256 24492e27c1d8dd77…

MALICIOUS

PDF

66.4 KB Created: 2021-09-11 02:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1d76e7a1898a5f8168b34ec3f57ce3b4 SHA-1: 152ba0e8d2a24cb7238e1d89b17c992606119283 SHA-256: 24492e27c1d8dd77d01c8e87460661594acc1cc8daef6d178442e974b360a7e3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, pointing to a suspicious PDF. The embedded URLs and the nature of the PDF suggest it is used as a lure to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6824

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://mamalight.net/business_school/uploads/file/xijokuxulegivorutipi.pdf In PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/nirinimowefivekirifogilej.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/37704565776.pdfIn PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/66713880589.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/64344697831.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/94833339876.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/dowotugokuwini.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/8858428608.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/28265001000.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/roselarumoraloguga.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/9036196041.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134c66cc2148---folusovesunowax.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/tefef.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/44302598320.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/pajiv.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/juguke.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/tadukasewapibijerogepulem.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/93211708641.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210903062428.pdfIn PDF document text
    • https://xn--90ah6akb9e.xn--p1ai/f/file/53895433626.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/59210292332.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/12967349180.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d1fd4aaac---buvut.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/99159604885.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/nimosubusajumabuvifijof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=concise+pharmacology+book+pdfPDF 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_off0000d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 17116 bytes
SHA-256: 214f8c78cef3569d5c7b431ca4bc70b0821e3a21fb693b6949a70f1b4185cd43

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