Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4f78a26033361c…

MALICIOUS

PDF

35.2 KB Authoring application: GIMP
MD5: f9ef43864a2ef23c7e9861fa43787b2b SHA-1: dc32539abc2f3a0bf9ed78aba7209cf5223aa38d SHA-256: ce4f78a26033361cc2858830f8bb961a93c004fc268e79cf8465a719bd96b1cb
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The primary attack pattern involves directing users to a network of linked PDFs hosted on various domains.

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://createdinhisimagellc.com/uploads/1/3/0/7/130776644/basumu.pdf
    • http://nutrixhealthcareltd.com/uploads/1/3/0/8/130813652/f521d538f7.pdf
    • http://zhuangguo94.com/uploads/1/3/0/5/130539229/d838ed9446709f.pdf
    • http://windowssavvy.com/uploads/1/3/0/7/130775692/jaragavogav_valeden_kipubude_webiruravaxeme.pdf
    • http://mrb2btechwriter.com/uploads/1/3/0/3/130323522/jivozo.pdf
    • http://josephwalker.net/uploads/1/3/0/3/130313037/vobukebe.pdf
    • http://scalenov.com/uploads/1/3/0/6/130621952/zemogasuke_kisituka_kisabemejo.pdf
    • http://tobegenz.com/uploads/1/3/0/5/130588540/zigomonila-fanexenasibo.pdf
    • http://beatrixhelenaevents.com/uploads/1/3/0/7/130739927/votukamokopix-jajuxajulol-dataw-sanarezowi.pdf
    • http://instantcontainer.com/uploads/1/3/0/6/130621094/7122845.pdf
    • http://www.ecommplish.com/uploads/1/3/0/6/130622027/dimefefujobev.pdf
    • http://price-loto.site/uploads/1/3/0/8/130813539/7952887.pdf
    • http://www.mol650eraywebster.com/uploads/1/3/0/7/130739029/05b18.pdf
    • http://mytriangleofsuccess.com/uploads/1/3/0/2/130287269/vepetewezaf-rakezozako-pevomob-xurof.pdf
    • http://wcd-gsus5c3w.mgh-r.ch/uploads/1/3/0/6/130639147/130639147.html#holland+riasec+test+pdf
    • http://www.ecommplish

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cfe.bin
5b260165cd6a9fd90130e4faa765999c46e240e6449b48c5437bffca3c51e4f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFE 8648 bytes

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