Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe137e0ebbacba0…

MALICIOUS

PDF

69.2 KB Created: 2021-09-18 05:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 98920f62cdbac157f2775c24c5dc04e8 SHA-1: 08d2a65151567fce1908a35355580ad6992ec9db SHA-256: 7fe137e0ebbacba0dbae1932ec25380084af1043e852ed10c673c8a778d1b3c0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' and the presence of a link farm suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4862

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://laborke.ru/uplcv?utm_term=viu+premium+mod+apk+latest+version PDF link annotation
    • https://mamap.in/ci/userfiles/files/lipitejogekakivujutemi.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/49e5c750e78fc4ec6b189b4352a72bb6/39556133096.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614192520ff09---73831842795.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/difidulekewixo.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/jetizimumu.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/kesososemireliwifi.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/19057804200.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/satonuvatavumede.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/88525125170.pdfIn PDF document text
    • http://biosystech.com/pdsFck/file/pozironu.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/xulajubagagifasabaxewox.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bb8d6da00---97315091453.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/48236210960.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/34487998328.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/pajutat.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/botus.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/37612868502.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/webabusumoxudivixopikeg.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/dezogapez.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/70164537422.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed51a9c373---12745593743.pdfIn PDF document text
    • http://feg.vn/uploads/files/80160848554.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/rikoj.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/zugesegev.pdfIn PDF document text
    • http://otczenacts.com/media/files/93637859351.pdfIn PDF document text
    • 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_off0000bab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB1 10780 bytes
SHA-256: 9b444ce4c2c4af1aa958d6f73a76f37b73a087e9ce7a22abe872e446fbcdfb10
font_01_sfnt_off0000d384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD384 17420 bytes
SHA-256: 35edd955703fcfb7956814f66ea4eb4906662bf02edcbd41a8619b5c4fda99a3
font_02_sfnt_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1