Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dca6991166ac44d…

MALICIOUS

PDF

41.7 KB Created: 2020-06-01 09:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0ebbe93bf7966955d03852627b6691f SHA-1: 2730b0ba6e916159c95b39337bea6dd802647c6c SHA-256: 7dca6991166ac44dd757e0ec1cdd9bed7b670edeb9891a6d0e874e691c259e4e
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to WordPress hosted PDFs, indicating a link farm for SEO purposes. One of the embedded URIs, http://bornfreebirth.org/uploads/1/3/1/6/131637316/131637316.html#motionx+gps+drive+download, is directly associated with the malicious verdict. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://bornfreebirth.org/uploads/1/3/1/6/131637316/131637316.html#motionx+gps+drive+download
    • https://fagasufirosi.files.wordpress.com/2020/05/parafitixezazegatoto.pdf
    • https://fatafujuk.files.wordpress.com/2020/05/pukorixomivodovukorobewe.pdf
    • https://wezuzuzor.files.wordpress.com/2020/06/39295813975.pdf
    • https://belakufenim.files.wordpress.com/2020/05/44813483416.pdf
    • https://jinotazataga.files.wordpress.com/2020/06/50673544785.pdf
    • https://fozebide.files.wordpress.com/2020/05/65289031211.pdf
    • https://muxidawumub.files.wordpress.com/2020/06/luxudipogufaxarisalitun.pdf
    • https://dufaxuxed.files.wordpress.com/2020/05/nexopo.pdf
    • https://zapokowivuz.files.wordpress.com/2020/05/44586546747.pdf
    • https://gavadopojame.files.wordpress.com/2020/05/nojezol.pdf
    • https://kofetuzep.files.wordpress.com/2020/06/bisexoremofefezezawa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006059.bin
e1d6e31e15311d80990184db9caa19d814bb8bbde63196d9ec420314591b6ac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6059 11204 bytes
font_01_sfnt_off000086b1.bin
313c3940a6f4aae92ceaa1b1a843de6e6f13411355a457aba6e018c383fce54c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B1 16060 bytes

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