Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f368601764fe7d…

MALICIOUS

PDF

74.9 KB Created: 2021-09-06 20:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ac2fe2b19a6fd1b960e22d578ecb955d SHA-1: 11ae575697f14fa39b78fbd12517c95a0cbb5c53 SHA-256: 74f368601764fe7d52ec0c213ba30925ee0da1306c328c0ee24c2f3145a4f0f9
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains a malicious payload. The heuristics reveal it functions as a link farm, pointing to numerous compromised CMS upload directories and disposable hosting sites. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5898

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 https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc43e7b887---rozowemudose.pdf In PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24186a9926---nuvutajeviponobaxijetit.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/3m1nv6tp0dl55obnobec53vvv2/55525101574.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16115ba1132ba6---tenovovamiri.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/bomawalukodutix.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/vubufalebeguguzemake.pdfIn PDF document text
    • https://123natura.com/stockages/files/65620870139.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/3912948733.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973f6d6f8ad---88904859601.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/41468269072.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/53705311734.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b634b7db129---44861907742.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b781e22011f---25010505753.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210817105350.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/duxagatemizarenukefewodix.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/sesokinexavu.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086aedce62d1---17132758224.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/94242702105.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/zimagijodosivejesilil.pdfIn PDF document text
    • https://kleinimmobiliere.lu/userfiles/files/sigojurejav.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/4711740814.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/jdamqgvomeo3hi99rgiohtumqe/xebigepovuvejoxup.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/tunemutixu.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/15134379858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=cengage+inorganic+chemistry+part+1+pdf+free+downloadPDF 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_off0000dca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 11352 bytes
SHA-256: 40e080ed36a9af3451f33628d9c387e5a993bcf77704a444db2b3abd94c4c075