Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e491a60691f801d…

MALICIOUS

PDF

64.0 KB Created: 2021-09-28 20:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d7c821544b10a5ee3a8603f0b4055a0e SHA-1: 78d6c50359ff98d4d9e21ceda8c73a0433fd4af6 SHA-256: 4e491a60691f801d95ef652d672378ba9b705de050f9b8a8578f6d5ff1ad26e7
94 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a critical heuristic. It contains numerous embedded URLs that point to a link farm, suggesting a phishing or SEO manipulation scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a large number of distinct hosts used for linking. The document body is heavily obfuscated and unreadable, providing no direct clues about its intent beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

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://rialta.ie/userfiles/files/27385206381.pdf In PDF document text
    • http://stamforgtechnologies.com/uploads/51639489149.pdfIn PDF document text
    • https://anandalaya.in/resources/file/26884678835.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/filagekokugosodimevu.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/66212193667.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/pofejilikafuwa.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/wojef.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/41743652125.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/71683261605.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/94908814494.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/mefasob.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/lalifu.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/kewegogifikimidatedukuv.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/nevuvewopixanupuvum.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/bazuxuranupepuxag.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/63906547780.pdfIn PDF document text
    • https://proxus.nl/file/77402944464.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/godixedawifopagilarab.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/magotulogob.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7fba9da00---waxuvadowabatinixowog.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/62197103351.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/kusulikuzowifilodokoxij.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614843fa8a207---devisajaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+print+pamphlet+in+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_off0000b0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC903 14856 bytes
SHA-256: 93d9c4c976b710d99c9fa3edca4ec366cf76622a670886ad268b455d10905b6a

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