Malicious PDF — malware analysis report

Static analysis result for SHA-256 928d588c79719e12…

MALICIOUS

PDF

70.8 KB Created: 2021-09-07 09:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 0e3ecc861785ac2a3452c9376552b392 SHA-1: 53ddfe6284d7ceaafd0449d6039bfa58447c689b SHA-256: 928d588c79719e12cb893d90078f96811068f48dec92eab55a130ce0191e49e5
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7937

Heuristics 4

  • 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://wastran.ru/uplcv?utm_term=exemple+page+de+garde+rapport+de+stage+pdf PDF link annotation
    • http://bright-mineral.com/uploadfile/file/2021051523025474.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/xudisijelalegasasenamavo.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ee1bb324d---31280756291.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/db82a0570a38ad12a1f4d76118bf1f07/84403345471.pdfIn PDF document text
    • http://cga82.com/admin/File/93239394094.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6b5daef0f4d83f7d7522de39a942344e/68929122872.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/98753407390.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/34835005229.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/81991663319.pdfIn PDF document text
    • http://jfk1969nola.com/clients/873000/File/sakojumepuse.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/wikozeworateki.pdfIn PDF document text
    • http://jamxmpharmatech.com/upload/files/lifexefagikopobi.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/bolegin.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8d58c2129---lelaliderot.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/xetiled.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210906103422.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/44c3df0cf160476e8bcf10730b06cb19/21000852150.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160decfb420931---78429273340.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/42117193404.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/e3c94430d97bd037799412ba61c32def/ninezubodarugixi.pdfIn PDF document text
    • http://sdds.be/userfiles/file/65539318375.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/60640230471.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/jinibakowotomawe.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/lolunefakegev.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_off0000d4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E9 18976 bytes
SHA-256: 6406c47c2e23f1373c54f2ada977c0e63a1dce8167af24aa53526d87f7e435c3
font_01_sfnt_off000104f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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