Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0dd909d070343e2…

MALICIOUS

PDF

77.0 KB Created: 2021-10-12 02:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 6eebc30e5caa6f967b304285d72ce168 SHA-1: e444bcfbcd122526890f598cd493818f6bf48a0f SHA-256: a0dd909d070343e2432257afaaeeeaa48928f61a80c960377a7a5da38aca3a58
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to PDF files hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM further supports this, indicating a non-clustered link farm on disposable hosting. The presence of external URIs and the overall structure suggest the document is intended to redirect users to malicious sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://cructi.ru/uplcv?utm_term=8+ml+to+drops PDF link annotation
    • https://berbagiangka.com/contents/files/kaxedaxepikululudama.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/webegatavojizov.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/80689643132.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/393c45a97bb80ad432b46b3c89aec1c9/42337950259.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/doguwe.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/81922958307.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/guserusajopirapexamefoj.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/kegobakofezegisapokeba.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/tuwamibinajijevusunefo.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/pisoxowarabapuzafujititif.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/mukupuzofojovuf.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/45521243573.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/19085567179.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/23293294732.pdfIn PDF document text
    • http://yachts-trade.com/files/65275535383.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/50167903648.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/pigefematarojizuvu.pdfIn PDF document text
    • https://ceylinpin.com/calisma2/files/uploads/sedet.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/u1agk2qi9d4envcqeko4imeqel/22942981867.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/91521465645.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/93252172689.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/50666894597.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/nazapilaropunokalo.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/kotekototolowajiz.pdfIn PDF document text
    • 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_off0000d558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD558 22440 bytes
SHA-256: 9353b7b8a40450c00ef9a3f11b0a960005e06cfd063c3d7b1997be60c010bc97
font_01_sfnt_off00010f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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