Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df4b9b571e7d606…

MALICIOUS

PDF

70.7 KB Created: 2021-09-13 13:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: db737573f104ee0b118fd408089fc4ce SHA-1: da4fd0453100c199738a8f0bc465ac1371433dd8 SHA-256: 0df4b9b571e7d60680022ced2e8e97e9fb72dd52dcaff1da4a5a31517ec1af69
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The presence of these URLs suggests the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6923

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://xn--oy2b19v1mb1yi.com/userfiles/file/wenifep.pdf In PDF document text
    • https://bisnismedsos.com/userfiles/file/begawufuzanenizaji.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16137a65013c24---sirado.pdfIn PDF document text
    • http://gerocuki.hu/user/file/72287531445.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/xurolizonagobeguzejeze.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/nonesivagisag.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/winutulekizanewata.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/femanij.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb333a1f84---51371675126.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/xuxodepufazodizotozulo.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/22367196954.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/dipuxasoditejedene.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/tetabudaruweg.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/39380461248.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/tesureguvarux.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/kozekividisij.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/84517398885.pdfIn PDF document text
    • https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/93475717389.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/75961601990.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/47931280622.pdfIn PDF document text
    • http://elitk.ru/_files/83373176943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=watch+night+at+the+museum+battle+of+the+smithsonian+online+freePDF 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_off0000d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD899 11016 bytes
SHA-256: e75c6874675ba47a41d9294dcbcf729f0d26453ef70732fe54b196251d686eff
font_01_sfnt_off0000f20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20F 17332 bytes
SHA-256: 8afbfa55fa450701e782cebc9beff626331ea567ac8ac2d95f0dd582b225dc9a

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