Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2bab7f1c27d367…

MALICIOUS

PDF

95.7 KB Created: 2021-09-18 22:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5861fdfd35bb2aafc9521398b764b51d SHA-1: 616e4759c2e32c64012fa4bb6d7b0695a79454d9 SHA-256: ee2bab7f1c27d36797548a98866b6e9c16aa63598a32cfdc6558340165c2ab9c
124 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to external PDF files hosted on suspicious domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a high number of distinct hosts, suggesting an attempt to distribute malicious content or phish users through a network of linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7978

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://transchem-tech.com/Uploadfiles/files/zosawujumufu.pdf In PDF document text
    • http://fitviewer.biz/files/file/pasaletewiwim.pdfIn PDF document text
    • https://mayxaydunghoangphuc.com/userfiles/files/50979808181.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/joburozevelelelivax.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/texil.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/gagozux.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/35382348061.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/98144267930.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/nubisofakemasu.pdfIn PDF document text
    • http://wdnederland.nl/file/zazobew.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/39183549322.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/duxeligo.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/wawuzezemexavesatumi.pdfIn PDF document text
    • http://skalamatbaa.com/userfiles/file/rafeworeferubopaw.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/75631987553.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/zumekupotojukivu.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/weparojobidovudojonejad.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/4889849767.pdfIn PDF document text
    • https://doitoutdoorz.com/file/RcgLVPFqygpRc6fx.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109100950213029.pdfIn PDF document text
    • http://devison-matras.com/upload/file/15793983613.pdfIn PDF document text
    • http://bptramptour.pl/files/file/demedisar.pdfIn PDF document text
    • https://coevent.ru/upload/files/negusekerekaloxafugez.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/fuxasekitujitenurikobulot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=portrait+of+the+artist+as+a+young+man+full+text+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_off000155f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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