Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b71099826efc697…

MALICIOUS

PDF

29.4 KB Authoring application: OpenOffice Draw
MD5: 16f64364b5caa8fc7b17ec664cdb2fb6 SHA-1: d9cefedbafd7d8d66b1ed5e8d0c33ee5461c3dcd SHA-256: 1b71099826efc697a8af22fbd57ce5827bdc8c909d1a327e11eb7a62e35d749d
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. The embedded URLs are likely used to redirect users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://socialbutterflyslp.com/uploads/1/3/0/6/130639081/1ff44.pdf
    • http://narcsandco.com/uploads/1/3/0/4/130478307/4466139.pdf
    • http://newkids.co.uk/uploads/1/3/0/6/130605076/95ea2508d92e.pdf
    • http://mlphotoservice.com/uploads/1/3/0/6/130605012/2134178.pdf
    • http://udo-lindenberg-handsigniert.org/uploads/1/3/0/3/130323220/7481076.pdf
    • http://dollarstopparty.com/uploads/1/3/0/7/130739260/9902071.pdf
    • http://nationalfootballcheerleadersalumni.org/uploads/1/3/0/4/130476255/130476255.html#tri+township+water

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011a4.bin
48a57f2681ddc1242cf4192152af03e3445d130812a946125819eeec556a8041		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4 7656 bytes

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