Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c9b4166d923add…

MALICIOUS

PDF

38.4 KB Authoring application: LibreOffice
MD5: 2f2166a50d24d34a450b0ab1589a6729 SHA-1: f1a86068e612828480c042a0dfb9e5df329025db SHA-256: 10c9b4166d923addaae522a2f96bd7a75bb7fc1786905f73ad0a4489a3b3fce3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to other PDF files hosted on various domains, indicative of a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of directing users to external malicious content.

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://msjacksonsclass.com/uploads/1/3/0/5/130539269/9716169.pdf
    • http://comingsoonrealestate.com/uploads/1/3/0/6/130621210/3f95c4a3624f.pdf
    • http://tmpropertysolutions.com/uploads/1/3/0/4/130491947/8ac09e34111791.pdf
    • http://wuredorut.mariocoin.ru/uploads/2020/01/28/4633bb7acb50257.pdf
    • http://sallydavisstudio.com/uploads/1/3/0/2/130272500/ziguv.pdf
    • http://piercingsbylexie.com/uploads/1/3/0/6/130605161/rewoko.pdf
    • http://jkeventfotgrafie.com/uploads/1/3/0/5/130539553/44d16065.pdf
    • http://dietnote.weebly.com/uploads/1/3/0/5/130551135/kutobazetefe.pdf
    • http://marketingforsalessuccess.com/uploads/1/3/0/4/130435884/sabibedejixibowi.pdf
    • http://jososesewe.myshop8.site/uploads/2020/01/28/wujasifivowasu.pdf
    • http://northernrailleaders.com/uploads/1/3/0/8/130874318/130874318.html#mapa+aruba+curacao

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001268.bin
05f7a76e815bc4929dc64335e7a45e976e1df54942b10aa30c212a74e3b8642e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1268 8540 bytes

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