Malicious PDF — malware analysis report

Static analysis result for SHA-256 4499720a387a4d64…

MALICIOUS

PDF

36.3 KB Created: 2020-04-06 03:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bbd782cfd1d6419713202ff774288a9a SHA-1: 5026a4af4c3429254b033a988cb10f3b4beecc23 SHA-256: 4499720a387a4d64269fc574a1cb5bc7f7b61ddd20485745a309d99a07a19921
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 to various domains, many of which appear to be part of a link farm designed to obscure malicious intent. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior. The primary URL points to a page that suggests downloading audio content, but the overall structure indicates a likely attempt to direct users to malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://burleypta.org/uploads/1/3/0/8/130815303/130815303.html#building+walking+bass+lines+audio+download
    • http://texturepoint.com/uploads/1/3/0/5/130551576/2834661.pdf
    • http://loveyourselfadultproducts.com/uploads/1/3/0/4/130476143/9683210.pdf
    • http://coloresdemitierra.org/uploads/1/3/0/6/130640146/2995513.pdf
    • http://thehomeautoetc.com/uploads/1/3/0/6/130621788/6896869.pdf
    • http://calmingthestorm.net/uploads/1/3/0/5/130551210/worutedagix.pdf
    • http://mizzenmanagement.com/uploads/1/3/0/5/130589279/tuvofojemiwalav-ligikomi-neribezutiga.pdf
    • http://hartconcierge.com/uploads/1/3/0/6/130621932/vaxezumunu_durag_fozani_totomolawax.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_off00006360.bin
f797fbdd1b7675c2f9a1f364237bcfcd9359994504af85279b51072bf872aee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 8120 bytes

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