Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e5cbf9abaa9056…

MALICIOUS

PDF

67.5 KB Created: 2021-10-04 16:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a0f5a9a0713f2fa62bce6b713a90b64a SHA-1: 0f6198669aceb8683c89ec3be6a4ce8e0fb733da SHA-256: c6e5cbf9abaa90566d6b3af79fc8c892f7b4e8619f6552ed4da801fe20ff673d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment used to redirect users to 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 http://monteconsultants.com/image/upload/File/wosopibideviruve.pdf In PDF document text
    • http://fluitec.fr/ressource/site-image/files/dudofitemukululum.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/dekima.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/98891284043.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/14727287701.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/kobevizesadepikaxaj.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/96141591312.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/ponifofuniwadegezixelu.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/34898874115.pdfIn PDF document text
    • http://caycanh.vn/images/fck/file/26462894426.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/59898583838.pdfIn PDF document text
    • http://fastbeatbattlerider.saint-fun.com/assets/upload/files/7931858486.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/rosowonodew.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613524911a013---fawoxisolavobek.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/36963437087.pdfIn PDF document text
    • https://kokomanis.com/contents/files/zugezeka.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/memosuv.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/86110035210.pdfIn PDF document text
    • http://honghuibio.com/d/files/gegegi.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/78560869388.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/29330505429.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/xajerulajopesaweturanor.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/xutavegalijivukipalekopu.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/33664814891.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/86208627091.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=alice+in+chains+heart+shaped+boxPDF 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_off0000d502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD502 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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