Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fa42f2378a4aa6…

MALICIOUS

PDF

41.2 KB Authoring application: pdf-parser
MD5: 4ebfc7fc999d994cb49ec6a7058e6560 SHA-1: 0dbbbed83177e7e8a4f772305f4c162040dc7a3a SHA-256: 76fa42f2378a4aa667622184756ad2e76022c40f39cdc2914eb293214f57dddc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also indicate maliciousness, specifically related to phishing. The embedded URLs are likely used to distribute further malicious content or for SEO spamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://zivixuta.kformacion.com/uploads/2020/01/28/5773936.pdf
    • http://galamosaic.net/uploads/2020/01/27/labovugukulone.pdf
    • http://newearth.design/uploads/1/3/0/5/130588601/kotudege.pdf
    • https://fodufixetok.weebly.com/uploads/1/3/0/5/130590478/dazexi_wabamunovepufo_likipezelo.pdf
    • http://rimoge.shaurmoff.com/uploads/2020/01/28/subipawanab.pdf
    • http://femixebum.vraonline.ru/uploads/2020/01/27/1074952.pdf
    • https://bepaxibomadof.weebly.com/uploads/1/3/0/4/130490928/c66c895d685ab1.pdf
    • https://limavisiver.weebly.com/uploads/1/3/0/6/130603937/7489514.pdf
    • http://ratasenadopcion.weebly.com/uploads/1/3/0/4/130435737/6333715.pdf
    • http://pexezi.promyvkapto.ru/uploads/2020/01/27/sifigasopeviwobugiv.pdf
    • http://keyautonj.com/uploads/1/3/0/5/130588153/7a17451b7d6.pdf
    • http://sharedtravel.voyagerwebsites.com/uploads/1/3/0/4/130435898/130435898.html#onion+root+tip+mitosis+lab+report+discussion

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012e2.bin
f47770bff65cdc681488499bdb5d7e23614a7581d454a61461d67633b42423c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2 8676 bytes

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