Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb263f7c8a6c409…

MALICIOUS

PDF

44.0 KB Authoring application: Karbon
MD5: ce2814938d02d85c34a53faa1019fedd SHA-1: cb4e6e87f64cf525f4d0a4c6da8764b645f99865 SHA-256: 9fb263f7c8a6c409f0c7e379dc799d12953b0cb46ef8d1c7942aaf00d3b22f64
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files hosted on various domains, indicating a link farm or SEO spam tactic. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and ML classification further support its malicious nature. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific intent beyond the link farm.

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://emilyrunkle.com/uploads/1/3/0/2/130270986/ebf26d8b4.pdf
    • http://prosolutionshomeimprovementgmail.com/uploads/1/3/0/6/130621897/16fb5ce9a19.pdf
    • http://haircreationsbyjay.com/uploads/1/3/0/2/130271030/zexudu.pdf
    • http://luckyrabbiteditions.com/uploads/1/3/0/2/130289163/xulugewadu.pdf
    • http://rentatek.net/uploads/1/3/0/8/130814052/rumiwujoramajo.pdf
    • http://ecfya.com/uploads/1/3/0/4/130476043/libanewa_narab.pdf
    • http://strategicengine.com/uploads/1/3/0/4/130435547/52236.pdf
    • http://mohawkvapors.com/uploads/1/3/0/3/130313702/xadakaposuf.pdf
    • http://ns1.sebastianjamesfoundation.org/uploads/1/3/0/6/130620948/d6f472e34093c.pdf
    • http://adentamalaysia.com/uploads/1/3/0/6/130603930/lugiwavorixivolutis.pdf
    • http://theselfishparents.net/uploads/1/3/0/6/130621702/ac230e601724.pdf
    • http://swepta.com/uploads/1/3/0/7/130739376/suwufidiredage_buwigex_darewinela_jefager.pdf
    • http://www.rebeccamguzman.com/uploads/1/3/0/8/130874220/713ec84715b.pdf
    • http://mphcustomgraphics.com/uploads/1/3/0/7/130776100/380580.pdf
    • http://exportcomfort.com/uploads/1/3/0/5/130550693/1993065.pdf
    • http://unityofstockton.com/uploads/1/3/0/6/130640019/futuwugowoga-fulogoja-xewumute-bikis.pdf
    • http://nicciballinger.com/uploads/1/3/0/4/130476649/gufiziraw.pdf
    • http://globallycraftedtravel.voyagerwebsites.com/uploads/1/3/0/6/130620317/130620317.html#list+of+most+common+german+adjectives

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004107.bin
6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4107 2864 bytes
font_01_sfnt_off00004de7.bin
96d3f1c5232d7e86cb58dad1d4a83d23bd51a50abf4bcc00765376be3b03aa80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DE7 8880 bytes

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