Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5355837cd7a4bf…

MALICIOUS

PDF

45.6 KB Authoring application: Adobe PDF Library 9.0
MD5: f4970f3450ecfe576820e50bef3e3d7c SHA-1: d839731f25ee695ae6034dabf7fbc649dc72d0e6 SHA-256: fe5355837cd7a4bf01419d3b3376e55530bc94623bc008044f85ab303391dc55
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute malware. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall, and ML classifiers also flagged it as malicious. The embedded URLs suggest a phishing or content distribution attack pattern.

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 https://nujesusapojedot.weebly.com/uploads/1/3/0/4/130483879/kasosaf.pdf
    • http://fanivu.maximumsporta.ru/uploads/2020/01/29/tagefuwazem.pdf
    • https://paludugagolekol.weebly.com/uploads/1/3/0/2/130288333/2d5e6ad68.pdf
    • http://arturotrovato-vo.com/uploads/1/3/0/4/130483393/2039539.pdf
    • http://lebo.vipiski-besplatno15.icu/uploads/2020/01/28/6352dd5be1.pdf
    • http://patfroelichcounseling.com/uploads/1/3/0/5/130588433/tikuleramawuzowo.pdf
    • http://winoaaiw.weebly.com/uploads/1/3/0/4/130489763/cf2d50232.pdf
    • http://carpetcleaningsv.com/uploads/1/3/0/6/130604162/kamurefanitupudobini.pdf
    • http://wugimebam.greevo.icu/uploads/2020/01/28/sodakimar_pesute_fimuwiwagaj_rabizikozexabel.pdf
    • http://bethlehembaptistchurchsaginaw.com/uploads/1/3/0/6/130639651/tufiwizige.pdf
    • https://memipogukumeg.weebly.com/uploads/1/3/0/2/130289332/mavofu.pdf
    • http://second-childhood.com/uploads/1/3/0/5/130545684/130545684.html#actinomyces+pyogenes+new+name

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001367.bin
7d5cbd6c19c3b6fc33bc0c5d5f97b8c82b9639382c78e5fcb4a5655983f48875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1367 8944 bytes
font_01_sfnt_off00007777.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 2652 bytes

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