Malicious PDF — malware analysis report

Static analysis result for SHA-256 8083e5c78b517dbc…

MALICIOUS

PDF

38.6 KB Authoring application: SWFTools
MD5: 39aaf8384eb66935d3d066cf50f7f50c SHA-1: 9d34aae92afc46c4f711dda7c25f027fa0678cbc SHA-256: 8083e5c78b517dbc65d4e5568a43ee8613f7f4924e65d80ddc84393bce9464a7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This technique is often used for SEO poisoning or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, aligning with the PDF_SEO_LINK_FARM heuristic. No scripts were extracted from this sample, but the extensive link farm is sufficient evidence of a malicious delivery mechanism.

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://lastnightslime.com/uploads/1/3/0/4/130488470/493015a75.pdf
    • http://acts2035.online/uploads/1/3/0/6/130620801/bafovafofa-lomakujamel.pdf
    • http://nclandandhome.net/uploads/1/3/0/6/130604486/kolis_nadologe_wisoxexuk.pdf
    • http://rosemarysaromatiking.com/uploads/1/3/0/5/130590672/jefivoseba.pdf
    • http://thefusioncollection.com/uploads/1/3/0/3/130379307/8015469.pdf
    • http://angelamatusik.com/uploads/1/3/0/4/130483576/c4b00ecf320.pdf
    • http://vannozzi.net/uploads/1/3/0/3/130379482/70c590591.pdf
    • http://pbcdac.com/uploads/1/3/0/3/130323175/xaxegegemesaruziv.pdf
    • http://wearmonster.com/uploads/1/3/0/4/130489123/ranag.pdf
    • http://nanni.info/uploads/1/3/0/5/130543386/d1efd635.pdf
    • http://www.thecatholiccandlecompany.com/uploads/1/3/0/5/130551967/b727dcaaa4b.pdf
    • http://nottinghamkickboxing.com/uploads/1/3/0/7/130776025/da399aba2b46.pdf
    • http://smooth-ironing.com/uploads/1/3/0/5/130542902/sobukijeb-bafelapudedu-puzunevaf.pdf
    • http://1304shopff.space/uploads/1/3/0/2/130288394/totixozale.pdf
    • http://ebaysalesapproved.com/uploads/1/3/0/8/130814868/nowikizavo-jolota.pdf
    • http://74-123-79-94.mgwnet.com/uploads/1/3/0/9/130969806/130969806.html#half+size+basketball+court+dimensions+australia

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a44.bin
0f4805818a27d148ce704102915dd784be04e9269c35164caef2e5b8ad72cc9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A44 8592 bytes

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