Malicious PDF — malware analysis report

Static analysis result for SHA-256 47481cc518c570b6…

MALICIOUS

PDF

76.7 KB Created: 2021-06-15 13:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5e8c1a52fe010cfea1f45e0e3d81eea2 SHA-1: 54118fbb90afadc426333a03a2269b1492f3d708 SHA-256: 47481cc518c570b63331e6a35a8b66d24a68fa785203849a763da767f4374a4a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

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 https://pistant.ru/uplcv?utm_term=telugu+dj+naa+songs+download+mp3 PDF link annotation
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/tl1d6cdkcvut2ce8e75tj6ddr4/49569723901.pdfIn PDF document text
    • https://digireg.cz/upload/86687016476.pdfIn PDF document text
    • https://anfauglir.com/images/file/jatamisinuvutaleluji.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/f2570435ae6b8ae9d4f48434d65a0302/jobigegejujulitaru.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaaa77051b8---renasanawobaxalurosojo.pdfIn PDF document text
    • http://valeneighbors.com/userimages/55582584706.pdfIn PDF document text
    • https://matskaren.se/anvandarbilder/203/files/bikuz.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085fb1892523---63839194959.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/22512110283.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086199858e7c---39451999586.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/43059367325.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/26774935b4cf75154e993a6745e6f26b/99351852474.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608f23dd7a7e4---39036216271.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/8f8e8808298e99f84389d86e4f331fc6/zixumilagonisijilek.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/16954298266.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/rq81qiqnet2d58bdt4ffu2ai6m/60909614024.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a56823b03a9---41490961570.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F0 6384 bytes
SHA-256: acedc839b4d9e0716bdd525cb02e6b9c5dd6d9e8c8e580849d6460eb072ede0d
font_01_sfnt_off0000e9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 5216 bytes
SHA-256: fbbf0886d1346433c433c866d30c90fc8738f63441974433292c515bd6bbb980
font_02_sfnt_off0000fb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB68 10660 bytes
SHA-256: 2ba0d9e6aa7977c1f26898cb6decd74a42bb5ed98c8de0577efa3da1d92011fa
font_03_sfnt_off0001202f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202F 16132 bytes
SHA-256: e888faa9002667b630927e817649ff30b430f30701d3ae5dd385702e02582ff5