Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0587ed9622e090…

MALICIOUS

PDF

39.9 KB Authoring application: Serif PagePlus
MD5: c2b97ef653ee6a41e15f469c7cdd87e5 SHA-1: f0f745c48bef7cd17b8ec7d376e87c6aaedca93b SHA-256: 7a0587ed9622e090f44f512dbd486a4d864771d4dff96a07ebffd5e57d0a4e13
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning and phishing lures. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though partially corrupted, references 'Matematicas 4 primaria edelvives pdf' and includes URLs that appear to be part of a link farm designed to distribute further malicious content.

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://toxepupave.plrsecretsclub.com/uploads/2020/01/28/81f22617d5.pdf
    • http://johnnyryanmusic.com/uploads/1/3/0/5/130590716/bikufametujizagijog.pdf
    • http://jevozuzato.paypal-support-limitted.com/uploads/2020/01/28/vogedanuwa.pdf
    • http://oaklands-care-home.com/uploads/1/3/0/7/130738974/regiriraduf_wumofemekopu.pdf
    • http://bethelmoms33.com/uploads/1/3/0/5/130542968/kabuwomolile.pdf
    • http://networkhearing.net/uploads/1/3/0/2/130287394/130287394.html#matematicas+4+primaria+edelvives+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010e5.bin
9c2afec38bdc2777d580c009177ab7023c9122f8d4b4b2ae74308700f3c122c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5 8868 bytes

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