Malicious PDF — malware analysis report

Static analysis result for SHA-256 8981ef62701e5517…

MALICIOUS

PDF

32.5 KB Authoring application: Poppler-utils
MD5: 6dac7c8252e271c905e8ddde1d4dfd0c SHA-1: 6d54eac862ef978bcb7387253d65d257b94e7724 SHA-256: 8981ef62701e5517437ad13668f3fcd9d489ace584080ce2088af4ed3a6e8824
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall-7605656-0, and ML classification strongly indicated maliciousness. The embedded URLs are the primary indicators of malicious intent, likely serving as lures for phishing or malware delivery.

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://toxejebejo.voloklinik.com/uploads/2020/01/28/5197999.pdf
    • http://camocarriers.com/uploads/1/3/0/6/130639298/bapububax.pdf
    • http://konradhansen.com/uploads/1/3/0/6/130622063/zatefex.pdf
    • https://zajatute.weebly.com/uploads/1/3/0/5/130589264/8b9cd6350e.pdf
    • http://mypersonalgifter.com/uploads/1/3/0/6/130639292/begifat.pdf
    • http://shymiahchanelextensions.com/uploads/1/3/0/4/130493143/vutewe_foforutukesup_mitasawida_riruxowaxu.pdf
    • http://moderndynamics.org/uploads/1/3/0/5/130551944/xiguneli_rawujobiba.pdf
    • https://japatogobegowus.weebly.com/uploads/1/3/0/4/130489803/xigomeno-sajigosotiwoda-kikigadaxozakut.pdf
    • http://rakshitbuildtech.com/uploads/1/3/0/5/130590578/459289.pdf
    • https://nejatevunesiz.weebly.com/uploads/1/3/0/5/130589334/de50815.pdf
    • https://zapezexajefozi.weebly.com/uploads/1/3/0/3/130313463/343860.pdf
    • http://merthyrmawrtrailrunningfestival.com/uploads/1/3/0/3/130313111/6430426.pdf
    • http://drpatty.net/uploads/1/3/0/5/130589381/130589381.html#d+alphabet+wallpaper+hd

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012cd.bin
12218219aee9639edac005ea76ec860eb011c3a1b391f8904b4e7d4e50798cfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD 7208 bytes

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