Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9aa7dae8a019b3…

MALICIOUS

PDF

72.0 KB Created: 2021-09-04 05:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2595d6000db416a534ea2c965bfdb91a SHA-1: 558d365740be740c9c25c76ee59e37331bc2af82 SHA-256: 6c9aa7dae8a019b323b457954d6c1a95a8d12b0219c837be316c8f175ffd2baa
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', further supporting a malicious intent. The heuristics suggest the document is a link farm, likely used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4326

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sor1310.com/userfiles/file/boxasuloxeg.pdf In PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/newonefudozexexoputufujik.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/49608371838.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/55588308997.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/jubifexitaxaratopogajig.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074c54ec4a43---wosutinetag.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/5ac4c08cf901ef0a076d8d98f29200ee/ladesozonewepeja.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/garat.pdfIn PDF document text
    • https://tonitomov.com/picture/file/dorapuwuzezanexogosoz.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/29573644450.pdfIn PDF document text
    • http://travelbilet.ru/sites/default/files/file/9934932155.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/99e927ca85df231423836c3a118afc11/zexuwu.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/patepi.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/89013183324.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/fafuvikur.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/20218311612304314.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/dfeba510c7ca3074a8c51ce9f706b4dd/27667582746.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/23605668286.pdfIn PDF document text
    • http://ashioke.com/images/library/File/ramilolinibigeke.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/99914fcb9c413b97d73bd16285b9371b/79306384765.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086674110746---gagafabonagonesusenofob.pdfIn PDF document text
    • https://arerp.kr/data/file///datomuna.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/38598832440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=anamnese+massoterapia+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_off0000c867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC867 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE079 19580 bytes
SHA-256: f04838f8447440a559d3fe93735b4590b7b57570fdb081a8cf33e49cdfaeee8c

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