Malicious PDF — malware analysis report

Static analysis result for SHA-256 36487dd2b82bba95…

MALICIOUS

PDF

49.6 KB Authoring application: Serif PagePlus
MD5: 1d1c7a1b7c272ced12c145f8ac906c23 SHA-1: 851977b6f7ca8e3184f684173f3cac0789d74f38 SHA-256: 36487dd2b82bba953b1faefdd6a9a13b2257443a5797ab2d8470d668b80b777e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted from this sample.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://adamrichardsteachingportfolio.com/uploads/1/3/0/3/130312972/9a6da842c.pdf
    • http://internetofmythings.net/uploads/1/3/0/5/130551772/6f774b9879926.pdf
    • http://raycelamb.com/uploads/1/3/0/4/130490808/4f18480e0347a.pdf
    • http://chambers-maids-brecon.com/uploads/1/3/0/5/130539768/7491309.pdf
    • http://rscareersupport.org/uploads/1/3/0/5/130588159/bcb4f091fa.pdf
    • http://bsmithcontracting.com/uploads/1/3/0/4/130436521/jugabamaju.pdf
    • http://shakti-circus.com/uploads/1/3/0/5/130544826/d7bd5acf817109.pdf
    • http://vickiaskew.com/uploads/1/3/0/6/130605278/mexim_rebitadupak_nalojafol.pdf
    • http://famowi.tatarstan.travel/uploads/2020/01/29/7502794.pdf
    • http://jaxu.trilo.icu/uploads/2020/01/29/cf19fa77e.pdf
    • http://mormon-clothes.com/uploads/1/3/0/5/130539265/ponozedepovo.pdf
    • http://kennedyatlibrarysquare.com/uploads/1/3/0/3/130379299/97bf49ac7af558.pdf
    • http://reboundat.com/uploads/1/3/0/4/130435570/130435570.html#fsa+3rd+grade+reading+practice+test+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001069.bin
fe994f988b1dbab0195aee973178fe67b42d4a69e0cba67e2b8bc801b9569d52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1069 8128 bytes

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