Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b276cabb7a76825…

MALICIOUS

PDF

34.2 KB Authoring application: Mobipocket Creator
MD5: d9fac02b60aab704c3f6ec903e00c861 SHA-1: f7cd9a778651931fca6eb8d0c41210220b365194 SHA-256: 1b276cabb7a768256147114cd828d1fb4d22c4a4599aaa5b58b7fb6ef9faa086
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document is disguised as IELTS speaking test practice materials to entice users to download further malicious content. The embedded URLs point to other PDF files hosted on various domains, suggesting a phishing campaign. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the phishing and malware delivery nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://rideamr.com/uploads/1/3/0/4/130488983/6504367.pdf
    • http://cascadesoft.net/uploads/1/3/0/5/130543488/9028487.pdf
    • http://sophiesticated-travelstories.com/uploads/1/3/0/6/130620622/7356473.pdf
    • http://eidointernational.com/uploads/1/3/0/5/130589413/7288903.pdf
    • http://pitor.eosplit.ru/uploads/2020/01/28/31d4fcbfe439.pdf
    • http://colddiamnd.com/uploads/1/3/0/6/130639160/130639160.html#ielts+speaking+test+practice+materials

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001068.bin
ea83e42837f379fe6e2501b12914e017f265fb2029f412e8afc8a9d1c88a57a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1068 8580 bytes

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