Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fa34e9db07eb36…

MALICIOUS

PDF

17.5 KB Created: 2019-05-02 17:52:16 +01:00 Authoring application: mPDF 5.7
MD5: 16430a268bc86e2cfbdc3d1b70545283 SHA-1: 6741db9e760e542cdd576a12c385a2554b8c61b6 SHA-256: 90fa34e9db07eb362206f5e8ccbcc2902d105d665710705f0a3bffe21520d3fa
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness. The dominant host for these links is 'cefasfese.4pu.com', which is suspicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

Heuristics 2

  • 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.
  • 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://cefasfese.4pu.com/4730735737738731/The-Name-of-the-Star-Shades-of-London-1-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/1736738733738/The-Name-of-the-Star-Shades-of-London-1-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/4739732732734737/The-Name-of-the-Star-Shades-of-London-1-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/5733730737730738/The-Name-of-the-Star-Shades-of-London-1-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/8736738736738731/Die-Schatten-von-London-In-Aeternum-Shades-of-London-3-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/8736738736737732/Die-Schatten-von-London---In-Memoriam-Band-2-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/1731739738739/Girl-at-Sea-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/9732736736739733/Der-Teufel-in-ihr-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/3739732731735739/The-Bermudez-Triangle-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/5738732739733/The-Last-Little-Blue-Envelope-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/4732736739736734/The-Vanishing-Stair-Truly-Devious-2-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/1730737739730739737/Fifty-Shades-Trilogy-Fifty-Shades-of-Grey-Fifty-Shades-Darker-Fifty-Shades-Freed-3-volume-a-review-by-Nick-Walton.pdf
    • http://cefasfese.4pu.com/4733731733730/The-Star-Rover-by-Jack-London.pdf
    • http://cefasfese.4pu.com/2730731739731739/13-Little-Blue-Envelopes-Little-Blue-Envelope-1-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/1730735739730733/Suite-Scarlett-Scarlett-1-by-Maureen-Johnson.pdf
    • http://cefasfese.4pu.com/1730733738733735735/Shades-of-Magic-2-The-Steel-Prince-Shades-of-Magic-Graphic-Novels-2-by-V-E-Schwab.pdf
    • http://cefasfese.4pu.com/1730733738734730733/Shades-of-Magic-3-The-Steel-Prince-Shades-of-Magic-Graphic-Novels-3-by-V-E-Schwab.pdf
    • http://cefasfese.4pu.com/7731734731738736/The-Devil-s-Muse-A-Maureen-Coughlin-Novel-Maureen-Coughlin-Series-by-Bill-Loehfelm.pdf
    • http://cefasfese.4pu.com/7733732730732733/Fifty-Shades-Darker-Book-2-of-the-Fifty-Shades-trilogy-by-E-L-James.pdf
    • http://cefasfese.4pu.com/7733732730732736/Fifty-Shades-Freed-Book-Three-of-the-Fifty-Shades-Trilogy-by-E-L-James.pdf
    • http://cefasfese.4pu.com/1730737739730739737/Fifty-Shades-Trilogy-Fifty-Shades-of-Grey-Fifty-Shades-Darker-Fifty-Shades-Freed-3-volum

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