Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef80ebb4de7e677…

MALICIOUS

PDF

32.0 KB Authoring application: SWFTools
MD5: d130986366c7f2a0327fb68cb8bd1d5f SHA-1: a3f9b084630fa034e9f0e49bb278b8cd1b3889d6 SHA-256: 7ef80ebb4de7e677e80b92d6d8231c0e98c550d790ec0431ae8e75be0124d7dd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1059.001 Command and Scripting Interpreter:PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The embedded URLs are the primary indicators of compromise.

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 https://tiwivunip.weebly.com/uploads/1/3/0/3/130313366/dd44e594285.pdf
    • http://aplangportfoliohenkel.com/uploads/1/3/0/2/130270946/derit-pokavipoju-givuzof.pdf
    • http://avtotool.ru/uploads/2020/01/27/600084.pdf
    • http://ludog.startyachting.ru/uploads/2020/01/28/nexireju.pdf
    • https://donurumudofiwe.weebly.com/uploads/1/3/0/4/130491166/2621715.pdf
    • https://tudojunono.weebly.com/uploads/1/3/0/4/130491008/sozopiro.pdf
    • http://vaxifax.zayavka-na-kredit.com/uploads/2020/01/28/6c2d9f6d43b7.pdf
    • http://kabi.sportvideoobzor.ru/uploads/2020/01/28/depilujodaris.pdf
    • https://godojere.weebly.com/uploads/1/3/0/4/130483067/rizixomu_gowafixo_figokixuxi.pdf
    • http://fovujosex.aspirantesmedicina.com/uploads/2020/01/29/7838355.pdf
    • https://fuwuxowa.weebly.com/uploads/1/3/0/4/130488946/da1a9fa36e.pdf
    • http://waf.kliningovaya-kompaniya.pro/uploads/2020/01/27/mubumukogisijidogibu.pdf
    • http://oakclass.com/uploads/1/3/0/5/130588987/130588987.html#2002+yamaha+big+bear+400+service+man

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001328.bin
cbab4a5f6386b8279af5a95ecc84177c478a6e7943f004eb9aef65b3f472f04a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1328 8496 bytes

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