Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d384509e824ed6…

MALICIOUS

PDF

79.0 KB Created: 2021-09-20 15:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: df865de058d84092d3062a61b02bd693 SHA-1: 1b5f5477ce2bcee3b5f548129fea92fc417d0e60 SHA-256: d2d384509e824ed688ce51c3b374d9affa6b555f1aabeda68c2f601bebd94d17
124 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of links pointing to various domains, characteristic of a link farm designed to obscure the ultimate destination and potentially host phishing content or malware. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further supports this, noting the use of disposable hosting and UTM parameters for tracking redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5466

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 https://halkapsikoloji.net/userfiles/file/1780884162.pdf In PDF document text
    • https://ccichn.vn/data/upload/file/9259649466.pdfIn PDF document text
    • http://sparkpro.lv/content/file/33457309503.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/44158585321.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/komitanegaxoluwesid.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/puvapunur.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/dixikiwuzesumena.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/tobipepazifolibif.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/bodofojirutagux.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/wunuwuxiwigenugobir.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/98426993028.pdfIn PDF document text
    • http://cdjuchuan.com/upload/files/48731231204.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/zaditedokimosonosijov.pdfIn PDF document text
    • https://cathita.vn/upload/files/34903629347.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/23fa870a06b9b6c05be3acd49d800e8c/joxizugi.pdfIn PDF document text
    • https://rajaunited.com/contents/files/bufigefafaropuga.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/88751032942.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/55180915975.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/pawebovonoferuperajogoto.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/41691129906.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/zetowodokenovowilala.pdfIn PDF document text
    • http://oembag.com/uploads/files/202109201902029345.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/53482504162.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/14742516636.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/givifasifasakepajitiw.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/dejumunumaxuzigus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=perfect+liker+for+instagramPDF 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_off0000f503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 10772 bytes
SHA-256: f812be03f59df353959c0cc3c6aa023abc5fedd2c997070529a4fbbc72e278d3
font_01_sfnt_off00010dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1