Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2710b9e10c54aa…

MALICIOUS

PDF

27.9 KB Created: 2020-05-01 16:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: aebc21773c59400d2999dad3c6dbcf66 SHA-1: 4b410122760f70acdc56695eefbe7b4122f7b8aa SHA-256: fa2710b9e10c54aa5088345b0685672f96f8302c919b87916ed719813a136f24
92 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or distribution mechanism. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of external links and their nature points towards a malicious intent, likely to manipulate search engine results or redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://erniebauer.com/uploads/1/3/0/2/130271051/130271051.html#wallpaper+photo+hd++new
    • http://southernautomationandsafety.com/uploads/1/3/0/6/130639472/xikiw.pdf
    • http://alittlebitofeverything24.com/uploads/1/3/1/4/131407877/zulamaxigavogiz-bifixurapopu-buxitiz.pdf
    • http://ellisfarmstn.com/uploads/1/3/1/4/131483020/2447510.pdf
    • http://mjkaudio.com/uploads/1/3/0/5/130551251/pinavudal.pdf
    • http://ovnicartes.fr/uploads/1/3/0/7/130739478/fowebubaxu-kobewuzevanolip-wemubojadodefu-xizugapev.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_off00004a63.bin
afc5a3702ef8c9814c4fa0140026e435b24494b06cd0842e580babbee97b147c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A63 6512 bytes

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