Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f69ebe97e3c4358…

MALICIOUS

PDF

36.5 KB Created: 2020-03-20 08:22:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b551fad1a2055e989b7750f4c920f8ed SHA-1: 5ec8cd66fc577dbe561d00636b73fafe933e5604 SHA-256: 9f69ebe97e3c43584f5803086fe9d66fae27f9a69a32a131663508f3426e9723
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, many of which appear to be SEO-optimized PDF files. This suggests a link farm or traffic redirection scheme. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm. The document body contains garbled text and some URLs, but no clear instructions or lures beyond the presence of the links themselves.

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://fundraisers-aylsham.com/uploads/1/3/0/4/130483125/130483125.html#converter+hexadecimal+para+binario+online
    • http://kbnlocextensions.com/uploads/1/3/0/6/130604369/1dad77cf284d.pdf
    • http://jebatista.com/uploads/1/3/0/9/130969026/8355840.pdf
    • http://wizdings.org/uploads/1/3/0/2/130291766/7208637.pdf
    • http://ocalsports.com/uploads/1/3/0/7/130775386/5866110.pdf
    • http://betterbartlettschools.org/uploads/1/3/0/6/130620574/3177b7d1382.pdf
    • http://translateoldgerman.com/uploads/1/3/0/2/130270859/9592387.pdf
    • http://stamp-out-hunger-wpa.com/uploads/1/3/0/8/130814562/faradagulelevi-gimisedofesa-gotuvawavoj.pdf
    • http://bigfredtribute.com/uploads/1/3/0/7/130738667/riluforozokuruve.pdf
    • http://www.adentamalaysia.com/uploads/1/3/0/2/130289019/7f209da40ce1.pdf
    • http://www.maxcopluscorp.com/uploads/1/3/0/5/130590158/83a553c8e.pdf
    • http://www.oasisgaminginc.com/uploads/1/3/0/6/130604621/pewexeromowor-talub-fulufev-kibirok.pdf
    • http://prosetrywms.com/uploads/1/3/0/6/130639437/3303737.pdf
    • http://www.nancymackellar.com/uploads/1/3/0/6/130603956/zozemeliwilovofefazo.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_off00006408.bin
de02d7504117682c33f4e0a539cc7da26d7fe67771ed994fe14d1a7edc68dd00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6408 9588 bytes

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