Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bc4f80ac2832d2…

MALICIOUS

PDF

42.6 KB Authoring application: SWFTools
MD5: e9169c2d56f8cec2822d3230c989d832 SHA-1: b5570fe31dc205cdcd0ad857dd124d128d54b6a9 SHA-256: 42bc4f80ac2832d2af695815bde3eb0da7f805e00b4d6af24974231fcc8f5fd6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, a technique commonly used for SEO poisoning or phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The embedded URLs point to various domains, suggesting a distribution network for malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://eindhovensereddingsbrigade.com/uploads/1/3/0/6/130640119/puzupesi-durirobubojo.pdf
    • http://naildbykk.com/uploads/1/3/0/6/130639553/ac44a03304112.pdf
    • http://balance4yourlife.com/uploads/1/3/0/6/130604740/4659582.pdf
    • https://wukoserexu.weebly.com/uploads/1/3/0/5/130544584/44e46256ba.pdf
    • http://booholiday.com/uploads/1/3/0/4/130476557/tinelapog-zegow-soxubodoxu.pdf
    • http://jeremyandkristina.com/uploads/1/3/0/4/130483817/perijevemozejede.pdf
    • http://nuohotel-zh.devsite-1.com/uploads/1/3/0/3/130379227/130379227.html#abba+dancing+queen+letra+youtube

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000111c.bin
9b899cb63ceff8e19ad88bbee58919c3330e388eb18c93a07f1fb52916cf3125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111C 9040 bytes
font_01_sfnt_off000050e6.bin
7f17de0d3fbe4c0df2624a83a3a060a20b42bf063a3ea2706e0ab0939b725fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E6 2368 bytes
font_02_sfnt_off00005a79.bin
062abeeb0630068c9ebda4cd69880ba7d22c023ef851e82e77d1a768bfa0705b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A79 17648 bytes

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