Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70a19cb9c835608…

MALICIOUS

PDF

36.6 KB Authoring application: Pdftk
MD5: 2fd3cc296d5e77e0108ff82cd16ee545 SHA-1: e5fa03396d6f594a8a38b6ae1bf1044a33358f69 SHA-256: c70a19cb9c835608149d9491d0bf718de073cf707c10569161eadbbf6754841a
150 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body itself contains text related to medical conditions, likely a lure to disguise the malicious intent of the link farm.

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://dieporzellanklinik.de/uploads/1/3/0/5/130551369/kalisim_kusufumavajumid.pdf
    • http://ravenstats.com/uploads/1/3/0/7/130739552/287a07f1bec.pdf
    • http://nep.perabet76.net/uploads/2020/01/28/3020da01af4e.pdf
    • http://lunchboxcafeny.com/uploads/1/3/0/6/130604737/kukuxe_fesififepuka_fawerena.pdf
    • http://analogi.us/uploads/1/3/0/5/130588540/8c368557cfdb.pdf
    • http://mobilehrandleadershippros.com/uploads/1/3/0/6/130604850/tigenitenan-posizonaluxe-rowekir-zezuza.pdf
    • http://anxietyfreepregnancy.com/uploads/1/3/0/4/130483271/2a12f446.pdf
    • http://heykarrieann.com/uploads/1/3/0/5/130550869/mubexoxamefufisi.pdf
    • http://adoptme.info/uploads/1/3/0/3/130323998/130323998.html#diferencia+entre+osteoartritis+y+artritis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001202.bin
ed5ce239578f7bfaa2d102bb4139a0361efb69227c02fcb5222a6d7b0c64067a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1202 8432 bytes

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