Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96ef412708a2e7d…

MALICIOUS

PDF

31.0 KB Authoring application: Pdftk
MD5: a226f32bda247438e9b523c0a675f263 SHA-1: 6055c0ab8ddd1fb5d8166bfb49dfcbf7d57b60b3 SHA-256: a96ef412708a2e7d42d5fe99993be9577164b376e4ad2eb7ce4fe4a8194ee1bc
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, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or redirecting users to malicious sites. The document body text, though partially corrupted, mentions 'Hedwig's theme sheet music french horn', which appears to be a lure to disguise the malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://3minuteheroes.org/uploads/1/3/0/7/130738739/romuwo-leposifev-ponos-pamiz.pdf
    • http://buggysplumbing.com/uploads/1/3/0/6/130604279/4693369.pdf
    • http://amhomeinspectionsinc.com/uploads/1/3/0/4/130490476/f416eb5c55d.pdf
    • http://lwmdtest.com/uploads/1/3/0/2/130289570/4125027.pdf
    • http://beckervetclinic.com/uploads/1/3/0/6/130603860/dakupowa.pdf
    • http://rightjoin.com/uploads/1/3/0/4/130476712/7545743.pdf
    • http://caddogap.net/uploads/1/3/0/5/130539300/lomemexelowopo.pdf
    • http://lunaparkstudio.net/uploads/1/3/0/4/130476804/raterawoxov.pdf
    • http://cfirthwssu.com/uploads/1/3/0/4/130436108/rujodazen.pdf
    • http://14weekends.com/uploads/1/3/0/6/130620849/gufijizujawi.pdf
    • https://foturafajalevak.weebly.com/uploads/1/3/0/5/130588390/fesibezifosu_tomebo_merimerezev.pdf
    • http://colddiamnd.com/uploads/1/3/0/5/130541950/130541950.html#hedwig%27s+theme+sheet+music+french+horn

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012aa.bin
b5caac36a5948ce1e409b1129164969ac80d28d2ddd2c9d8173afef7b663a059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA 7668 bytes

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