Malicious PDF — malware analysis report

Static analysis result for SHA-256 9045f3e6a14f93e2…

MALICIOUS

PDF

68.3 KB Created: 2021-09-07 13:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5d67a7c7401481a1162572ec6e6e9b93 SHA-1: a200ba0fee6f5299a2b5020b1b29935e2a11bb7f SHA-256: 9045f3e6a14f93e2e85805afde803985a279c389adf0c28fe335089a89d33be8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests this is a common tactic for SEO poisoning or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9192

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://travellerisland.com/files/jutidopuwozaxutozi.pdf In PDF document text
    • http://sparkpro.lv/content/file/gijugumufi.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/f9eba3a0bdf8cc9675d43388ee8fd5bc/5657983427.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/86329774592.pdfIn PDF document text
    • https://technische-dokumentation-hoffmann.com/upload/files/56911729097.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/15469049108.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/kiketa.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/43517889027.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/99711895304.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/ee0jkimkrasvdjh7dkbu12kjct/noduvekazu.pdfIn PDF document text
    • http://computerdoki.hu/user/file/jifososurinakegisozuta.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65c19c86ad---63585702872.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/96614476082.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/f5a6c0978fade5bfe6ea97e4c45a8962/falipikigepukozex.pdfIn PDF document text
    • http://ducnhua.com/upload/files/88690150424.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/a3943de775b47b09634b012dad4c7fc9/97672357677.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132995a5c558---rixozesipuwotageb.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/537d3397cb83630d08b630c8e8122baf/87886683980.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e918f5f7e6---powewamapedus.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/kk6vehku71rtukssbdob0bl81t/tinuwifojix.pdfIn PDF document text
    • http://iworking.vn/uploads/files/gofowobelujoravijefuseti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=adjektivdeklination+ohne+artikel+%C3%BCbungen+pdfPDF 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_off0000d0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C9 11312 bytes
SHA-256: de0a3320baa8ba85be27fcc5e0014ccf88bfbd93df736a66bf0c9254e637d389

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