Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ae8d0abd910d70…

MALICIOUS

PDF

32.8 KB Authoring application: SWFTools
MD5: c5bd8f87185575b63baa2d0404b59a77 SHA-1: 630d3be4755da58ad5e3602ba84103ee02ae8d8d SHA-256: f5ae8d0abd910d70ee02b505bab6148629f4b5575737439de68c4cf61ccc38f3
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 to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted from this sample, but the link farm heuristic is sufficient to determine the 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 http://moderndaymira.com/uploads/1/3/0/6/130639282/gunuwopivanilobi.pdf
    • http://www.blog.yankeehomeinc.com/uploads/1/3/0/6/130603874/zumaduxama.pdf
    • http://stoneycreekalabama.com/uploads/1/3/0/2/130289721/fosoguv-xovunegi-xorovuvineba-ludek.pdf
    • http://ohheglows.com/uploads/1/3/0/6/130639821/vebazam.pdf
    • http://www.futuredrawnoneline.com/uploads/1/3/0/7/130739290/sinawesegafad-nagaru-gakave.pdf
    • http://www.design-fancy.com/uploads/1/3/0/6/130620635/8723189.pdf
    • http://hungrybearlunchbox.com/uploads/1/3/0/7/130740323/7062374.pdf
    • http://mrserio.com/uploads/1/3/0/7/130739459/xivojekejadedifob.pdf
    • http://solfeggiohypnosis.com/uploads/1/3/0/6/130640020/1f4f7095fb8b6e.pdf
    • http://mercymedicalarts.com/uploads/1/3/0/6/130605373/4009410.pdf
    • http://cindyblanton.com/uploads/1/3/0/4/130476784/daca12cb23d9.pdf
    • http://www.ecoyoga.us/uploads/1/3/0/7/130740124/7411065.pdf
    • http://newplumtreeheights.com/uploads/1/3/0/2/130288426/a62a3b96.pdf
    • http://www.independenteyesrc.com/uploads/1/3/0/5/130588635/130588635.html#design+failure+mode+effect+analysis+ppt

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a49.bin
f8f07011f01cf2bca57b64ffa93a25e4697d1a71c51b3189070fba31391ccf34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A49 6868 bytes

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