Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02c0e28efb465bd…

MALICIOUS

PDF

41.0 KB Created: 2020-04-18 07:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: af3df9fb9e2e5a2e2fd3762ff98e8b34 SHA-1: 85e518c8f3d4abce37048bec6db20ead473ae8e7 SHA-256: b02c0e28efb465bdd8ab1d755dbbd25be24e5a5e61791af1b1db8bdca9258ff8
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though corrupted, contains references to URLs such as http://trinsicapparel.com/uploads/1/3/0/7/130738854/130738854.html#dirty+riddles+and+clean+answers and http://autosbuy.net/uploads/1/3/0/6/130603997/8890276.pdf. This suggests the document is designed to redirect users to a collection of other PDF files, likely for SEO spam or to host further malicious content.

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://trinsicapparel.com/uploads/1/3/0/7/130738854/130738854.html#dirty+riddles+and+clean+answers
    • http://autosbuy.net/uploads/1/3/0/6/130603997/8890276.pdf
    • http://abt-accounting.com/uploads/1/3/0/7/130740625/winonukoserunubifu.pdf
    • http://camilabellydance.com/uploads/1/3/0/6/130620483/3340095.pdf
    • http://waialaekahalachapel.com/uploads/1/3/0/4/130488308/5ca4bdaf9da064.pdf
    • http://strongrootsfoundationmn.org/uploads/1/3/0/5/130539231/49eff8114306b.pdf
    • http://newriverknockouts.org/uploads/1/3/0/5/130539757/e2626808fcc1b.pdf
    • http://internetofmythings.net/uploads/1/3/0/6/130603896/wexupovusiwito_gogede.pdf
    • http://greencanopycustom.com/uploads/1/3/1/4/131437046/9f7bff2edb16bd0.pdf
    • http://jingarrigue.com/uploads/1/3/1/3/131383751/ralutodovotelifaw.pdf
    • http://landloveblue.com/uploads/1/3/1/0/131070195/jakelomukemawo.pdf
    • http://kiteandbuckle.com/uploads/1/3/0/5/130588861/filabofeloduvizim.pdf
    • http://www.ssjo.org/uploads/1/3/0/5/130543168/bajuduzokupopavebu.pdf
    • http://schreiberventures.com/uploads/1/3/0/4/130476830/d9a861f5694d95d.pdf
    • http://williamslakesoccer.ca/uploads/1/3/0/7/130776205/kesebikepanokuwuso.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd4.bin
64260cfb6456552c2c218d75293eed6788e189fc9ac3e693a95a7b927cfc5a51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD4 7280 bytes
font_01_sfnt_off00008c7a.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7A 2652 bytes

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