Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce6f8064cd5778a…

MALICIOUS

PDF

39.2 KB Created: 2020-06-04 06:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f97a9f858d5c8dc23bf7b1ac2fab3bb0 SHA-1: 68a39f7bc8ac73e3793a0457e8a07fe06917b8a3 SHA-256: 2ce6f8064cd5778a4815439832e59a677452e4b04dc008f44a05b74a2d07cb21
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many with numeric slugs, indicative of a link farm or SEO scam. The document body mentions 'Nvidia 3d vision 2', suggesting a lure to attract clicks. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, and the primary malicious activity appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://mybarrieroflavish.com/uploads/1/3/0/7/130740385/130740385.html#nvidia+3d+vision+2
    • http://boettiger.cl/uploads/1/3/0/8/130873877/xavimumomeluven_doxeboga.pdf
    • http://scentcosmetics.co.uk/uploads/1/3/0/9/130970009/7d396a0fe956e.pdf
    • http://thedoylehotel.com/uploads/1/3/0/5/130550800/8337724.pdf
    • http://suitestaff.com/uploads/1/3/1/3/131384254/zikasisutu.pdf
    • http://romboid.pl/uploads/1/3/1/3/131398373/e2abd3f058d6d6.pdf
    • http://newmarketmedia.biz/uploads/1/3/0/9/130969825/0d28b1437fae6e.pdf
    • http://mail.outonthetowntransportation.com/uploads/1/3/1/3/131383548/9244288.pdf
    • http://notforsakenministryinc.org/uploads/1/3/0/6/130604049/6331695.pdf
    • http://evamacdonald.co.uk/uploads/1/3/1/8/131857049/aab9c.pdf
    • http://mybarrieroflavish.com/uploads/1/3/0/7/130740385/terms.html
    • http://mybarrieroflavish.com/uploads/1/3/0/7/130740385/dmca.html
    • http://mybarrieroflavish.com/uploads/1/3/0/7/130740385/policy.html
    • https://lafukaraziba.files.wordpress.com/2020/06/popotifevumigamemodixit.pdf
    • https://bijozoje568648272.files.wordpress.com/2020/06/98904959821.pdf
    • https://tufegutoxa.files.wordpress.com/2020/06/dukomi.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_off00006887.bin
728cd0da77f55f8390abe57f75509d2ce1214dbe464ffea13185faa5c84a9354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 13172 bytes

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