Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0b0b5ff269937b…

MALICIOUS

PDF

34.7 KB Created: 2020-04-09 11:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a20fa1adbf4f49236437f3da6bdbbafc SHA-1: 02f0243659faf1c31aad9b3a9013b6b8560505dc SHA-256: 2a0b0b5ff269937bb0c9ff05069e0bf2a1cb3e85e8b4b038f56edddc10ba2e7a
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, a technique often used for SEO spam or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The document body contains garbled text and what appears to be a title related to mathematical transformations, but the primary malicious activity is driven by the embedded link farm.

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://borgorossodisera.com/uploads/1/3/0/8/130814783/130814783.html#rotacion+traslacion+reflexion+matematica
    • http://mpautosales.co/uploads/1/3/0/6/130639779/2412367.pdf
    • http://northforkinfo.net/uploads/1/3/1/4/131437311/mukerakin_zezole_segumaromi.pdf
    • http://jl-imagery.com/uploads/1/3/0/8/130814706/89999220.pdf
    • http://tenderlointimes.org/uploads/1/3/0/2/130289238/jugopudozixev.pdf
    • http://rhenie.com/uploads/1/3/0/6/130605422/6136909.pdf
    • http://kamilletateenterprisesllc.com/uploads/1/3/0/4/130436252/268c3e290.pdf
    • http://marketingwizardpro.org/uploads/1/3/0/3/130313345/9543846.pdf
    • http://bridgecitygraphics.net/uploads/1/3/0/5/130551125/gozojolexinogu.pdf
    • http://redappledietitian.com/uploads/1/3/0/6/130620919/gawuxulove-tuzup-kigexi.pdf
    • http://clikresume.com/uploads/1/3/0/8/130813800/runaxemesu-nanatasu.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_off00005cbd.bin
dbe940a96ad279c84ee0cb789373debf60cea82737795712ccfe928b54c457e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBD 8620 bytes

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