Malicious PDF — malware analysis report

Static analysis result for SHA-256 da84d00b1ea969a2…

MALICIOUS

PDF

84.1 KB Created: 2021-08-25 22:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e11afa30806db7cb1616e29c38a8d87e SHA-1: c929368d79667f9cb40c7b7fe34197aff956d2d1 SHA-256: da84d00b1ea969a21dffe22e466b3e4444ae0812eb7d4b56c64832d0064284e0
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a significant number of external URIs, many of which are part of a link farm hosted on compromised or disposable domains. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely facilitates the redirection or exploitation, while the link farm aims to obscure the final destination and potentially distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 http://autoshiftbid.com/fckeditor/userfiles/file/mapanisalonidenufutabexix.pdf In PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a71da5232---rapoxubeji.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/84010064647.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/46852426092.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/65202653373.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/36622176904.pdfIn PDF document text
    • http://jingchengs.com/jingchengs/ckfinder/files/20210804121729.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074d8d9ee2b4---72730781195.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/zomupukiwutadilupakaxad.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/beniziriwefowoxejip.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/17414340489.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ej7rvqdg1kd9mdvge0tg40emtj/62297084367.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16082656dbd738---woluvelivejum.pdfIn PDF document text
    • http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/fupinilegamivas.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210706005802.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/45483349612.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/tijetoniwo.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/62323038123.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/zorov.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/2a80f5607d04b94c32538ed1a64e1e1f/pozazuwinexurebazosarudo.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/59298175281.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/fugar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=jay+z+beyonce+bonnie+and+clyde+mp3+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000cd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD51 17748 bytes
SHA-256: 8021c418f63f01bbd41578dcfad4a72899fe9ad75a258408c7c86e04ad37bd8d
font_01_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001135b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 16228 bytes
SHA-256: 11c5a07d087146020572b41e3c25cf6f3fd7b709257038c787216a38c3b0495f
font_03_sfnt_off00012943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12943 10872 bytes
SHA-256: 9c3f3e9948490bbeef40d4fc9e2354817e5e783bc1418b07ea5222601e080984

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