Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad24d1090f3207e7…

MALICIOUS

PDF

34.0 KB Created: 2020-06-03 22:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e491a8f73d678e785b09402cc2224281 SHA-1: 361d87538060a5813f8d3ee7684f06a650534078 SHA-256: ad24d1090f3207e79aa470afdbd1d635049821183ed4e351585a02fe4f01d845
96 Risk Score

Malware Insights

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

The PDF document uses a lure related to 'Maleficent 2014 full movie download' to entice users. It contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. This suggests a link farm or a distribution mechanism for further malicious content, rather than a direct exploit. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • 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://4nk.undesirable.us/uploads/1/3/0/7/130776245/130776245.html#maleficent+2014+full+movie+download
    • http://abileneandbeyond.com/uploads/1/3/0/3/130323381/zibib.pdf
    • http://tubtechllc.com/uploads/1/3/1/4/131407711/pidate.pdf
    • http://aaqrestoration.com/uploads/1/3/1/3/131379231/1409555.pdf
    • http://americanizada.com/uploads/1/3/0/6/130622058/0e0d91090b5c.pdf
    • http://vorvia.info/uploads/1/3/0/9/130969813/xobaka.pdf
    • http://motherearthlawncare.com/uploads/1/3/0/5/130588703/nolozuj_tomabaje.pdf
    • http://4nk.undesirable.us/uploads/1/3/0/7/130776245/terms.html
    • http://4nk.undesirable.us/uploads/1/3/0/7/130776245/dmca.html
    • http://4nk.undesirable.us/uploads/1/3/0/7/130776245/policy.html
    • https://dekupuwapo627084595.files.wordpress.com/2020/06/merekofenuk.pdf
    • https://kugebimik.files.wordpress.com/2020/06/tefudufofijinugajuxebab.pdf
    • https://juwojoxado89904707.files.wordpress.com/2020/06/sediso.pdf
    • https://mosufazu.files.wordpress.com/2020/06/25192097100.pdf
    • https://nevosoxe.files.wordpress.com/2020/06/wijuradabakoni.pdf
    • https://zadidepetox.files.wordpress.com/2020/06/73035912989.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a6b.bin
0d6b0d21cd0d17553ad0db0876962eec128b7ae92b339d31a110cf883086bb96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6B 10000 bytes

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