Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78432306cca77c6…

MALICIOUS

PDF

85.9 KB Created: 2021-08-18 13:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5ca0341fc76b51b0f93aa36a649b27ed SHA-1: a4cf4c2a107ab59249c168f9a1a011213d5ebfdb SHA-256: d78432306cca77c698c7adf8ea7876b341fbfc71b8044d540dbc480aaca7c380
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6186

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://mmszke.hu/files/file/65117465688.pdf In PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/70329782603.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/modonibepejufesovek.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b42af39ec8f---67588118986.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a37dd3b0e---39064828918.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/62078815848.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/wakedetupafixaz.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/wuxuxawamegiso.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/57831274331.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/b249a877d8456a7c8c71928839c01305/sofok.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f988a3fdfd---96512867971.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/3ac398e4f43d0f24d469aa9c0778411e/27823095793.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/krrtp41gjfodsbeiem94epu6r5/zegozowivuleze.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/fibelikigu.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/lenojepinuziporowam.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/11206274360.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/solifafosib.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607018bef2368---dedos.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/1432de50885773750af5bb6cd2bf41c3/fitejadokire.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/98582409607.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/11632537014.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/cebqfeadgo8sgjv0k5r81rbhc5/sotilugugifofekiva.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/acb1df5c474926f1d5d7c24d91c4b484/sexukobalibifevela.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/timilulapu.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/jnfmgmobkqqnhsrio362qt9eko/17449200427.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/pugivazoja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=are+website+titles+italicized+chicagoPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 10812 bytes
SHA-256: e42f7fed5e0991ecb94e7ba6764c80d38a4e920608259290102f10b1a382225d
font_01_sfnt_off0001104c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001285e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285E 17476 bytes
SHA-256: 702ac796fb480de97026386c885ade9ffd5faf1f8efdea868da468838a1747cd

Open this report in the interactive analyzer, or submit your own file for analysis.