Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb2a39c1386c523…

MALICIOUS

PDF

36.0 KB Authoring application: LibreOffice
MD5: 18f126389d1d18a72528ce7b148d4d59 SHA-1: 70871ddd7181bfdcdba8ceb9653f6a32b9d8f879 SHA-256: 8fb2a39c1386c523a7374e0ac5745b96d6041b3cd7459655cb1a67d13dd8c78e
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier. The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external PDF links, with the primary domain being walnutcreekgolfacademy.com. This suggests the document is designed to redirect users to potentially malicious or spam content, likely for SEO manipulation or phishing purposes. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://walnutcreekgolfacademy.com/uploads/1/3/0/6/130620423/912937.pdf
    • http://bethanystafford.com/uploads/1/3/0/3/130379174/f345d9df5c.pdf
    • http://nob.ny2003.ru/uploads/2020/01/28/zifoluvugavagami.pdf
    • http://alexmooneyjones.com/uploads/1/3/0/6/130604582/ziloxefaw.pdf
    • http://pushingthetippingpoint.com/uploads/1/3/0/6/130605389/sagopazowitujobavi.pdf
    • http://katasip.kidshop.info/uploads/2020/01/29/bojapozanixenaz_ladimodezinavik_sarasubuze_memuvitiliso.pdf
    • http://flashapp.online/uploads/2020/01/27/wamajipadozusatax.pdf
    • https://lolijuxinu.weebly.com/uploads/1/3/0/4/130489172/29418e2163eb.pdf
    • http://corsettiparalegal.com/uploads/1/3/0/4/130488506/18ab5af023ec.pdf
    • http://megazin.fun/uploads/2020/01/28/909814.pdf
    • http://onemagazin.ru/uploads/2020/01/27/pumepuxipujen.pdf
    • https://mudeduni.weebly.com/uploads/1/3/0/4/130478205/rijifeleruj.pdf
    • http://youtubevideoscreation.com/uploads/1/3/0/5/130544625/watutobukakupazodo.pdf
    • https://nalisipurokiro.weebly.com/uploads/1/3/0/6/130605162/1594413.pdf
    • http://akhnasemi.com/uploads/1/3/0/5/130589286/8932575.pdf
    • http://sweetestdreams.org/uploads/1/3/0/4/130483238/130483238.html#windows+server+2012+install+configure+and+administer+active+directory

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001462.bin
ee3acb82cb52c4b8f123d51244e3f1a4b2bbdddeadec84603ade3cc7581d0fe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1462 7948 bytes

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