Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1c9e33fcfe6b2b…

MALICIOUS

PDF

32.9 KB Authoring application: pdf-parser
MD5: 1fd22d8034ad96332765f5d74ee1c23f SHA-1: 038169c1cff92fc4d8c157dd22fe72ec46742360 SHA-256: fb1c9e33fcfe6b2b44c31a718ec1a3bd28d76558eef6b105535ab7772fd5292a
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 pointing to external PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious intent, likely related to phishing or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://stonepinelabs.com/uploads/1/3/0/5/130545334/laruvobali-tedivuzuvakut-mozugedile.pdf
    • http://neilsalem.com/uploads/1/3/0/4/130491063/4270977.pdf
    • http://domterapii.com/uploads/1/3/0/5/130551124/aa769e55201b3.pdf
    • http://sweetsbykay.com/uploads/1/3/0/5/130544009/698343.pdf
    • http://northernrailleaders.com/uploads/1/3/0/6/130639212/130639212.html#one+ok+rock+wherever+you+are+mp3+dow

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ce.bin
abca36a8eefec6f21b93769d64e79ef5027576c73c67c65472787fb343675706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE 8340 bytes
font_01_sfnt_off00004177.bin
37e696e3b90e4f6c40450276623066bfb4958bac890a948cfa2b6adc1de7ae36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4177 4176 bytes

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