Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd2c496d63cc282…

MALICIOUS

PDF

41.3 KB Created: 2020-04-04 09:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b2320f4b7ff17ed2ba3002a36994b871 SHA-1: 1f62b37f8e4d803ccebb25a5feea233ff0b49438 SHA-256: edd2c496d63cc282eba996042a136c1a14b761f71a50ce2de89bafb9793fb741
92 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a technique commonly used for SEO link farms. The primary heuristic indicates a mass external PDF link farm, with 24 links pointing to various domains. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs likely serve as a lure to a network of malicious or spam content, aiming to drive traffic to these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://scrubs4work.com/uploads/1/3/1/4/131484133/131484133.html#does+otitis+media+cause+hearing+loss
    • http://happymomenttoday.com/uploads/1/3/0/8/130873860/futulokukubexo.pdf
    • http://advancedbiocomputing.net/uploads/1/3/0/5/130539305/4224698440ec9.pdf
    • http://revive.site/uploads/1/3/0/6/130639642/6692457.pdf
    • http://leiyamahoneymassageandbodywork.com/uploads/1/3/0/5/130551625/pumujidixe.pdf
    • http://zittelsfamilystables.com/uploads/1/3/0/5/130546543/a2b46e816.pdf
    • http://lmlongoriginal.org/uploads/1/3/0/7/130776123/zagezuruzadexobufow.pdf
    • http://engineersci.com/uploads/1/3/0/5/130551467/49f44f581b9858.pdf
    • http://tmracingsales.com/uploads/1/3/1/3/131384201/67ef00.pdf
    • http://springfieldmolimo.com/uploads/1/3/0/6/130639474/sigurilebojubada.pdf
    • http://wisconsinweddingmusic.com/uploads/1/3/0/4/130488286/bipib-papomitamuvab-zogikajasepef.pdf
    • http://myactiveglobal.net/uploads/1/3/0/8/130814349/b9d20f.pdf
    • http://tamarasimmonsmintries.org/uploads/1/3/0/5/130588565/57ecb2c71a4306a.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_off00007ab9.bin
cd12b58871240af58fa3d3c386ef2d6c703766ba8c92c36fe108aca8863e46d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB9 7572 bytes

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