Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34b2dcb49ee3361…

MALICIOUS

PDF

75.1 KB Created: 2021-10-04 12:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7ead7d41ca62ddecfdebeae7c182df6f SHA-1: ce7901c9c995d43e3332e6103233c7f7f8a7d628 SHA-256: e34b2dcb49ee3361095a211e198c5578cb90dc0e550263b27b23fb64a2d9b814
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV, indicating it's likely a phishing or malware delivery attempt. The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as part of a link farm on disposable hosting. This suggests the primary goal is to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4752

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://www.sesc-am.com.br/Selecao/ckfinder/files/32268043858.pdf In PDF document text
    • http://chickenwild.com/upload/contents/images/images/31208338995.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/56125903007.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/belofalodiwun.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/28793281278.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/58784059758.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/88042119786.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/46620048094.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/49574726538.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/vimetifibixut.pdfIn PDF document text
    • https://motecx.com/images/file/77902448276.pdfIn PDF document text
    • http://sayarbobinaj.com/file/49841152871.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/91155649357.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/61090518731.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/67916096131.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/zetogokofapuxajewelude.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/41076955504.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/43634853028.pdfIn PDF document text
    • http://micdelhi.in/userfiles/file/korememufu.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/67244769264.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/valuzenavaze.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/6746317783.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/84694680630.pdfIn PDF document text
    • http://eternaseguros.net/files/files/tufuxuseduxanegisi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=really+hairy+chestPDF 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_off0000dc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF425 10260 bytes
SHA-256: fc25f80e394005db233fe236d2ada4e83f5785b6488383371ccdb3b6f8220a1f

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