Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3465e3e6ec32a1…

MALICIOUS

PDF

46.1 KB Authoring application: Scribus
MD5: 159a27154cadb9fa8ebf7ac1384efff5 SHA-1: 77769fc958d2d9721b0bc7ed964c56392ca03cf9 SHA-256: 5f3465e3e6ec32a1edfda2b69b26a51514ecc53f4b6b0d3028dcd7695ae40f76
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or redirection strategy. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall, and a machine learning classifier also flagged it as malicious. The embedded URLs are likely used to distribute further malicious content or phish for user credentials.

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://neongenuine726.weebly.com/uploads/1/3/0/4/130483355/f6d53dd0.pdf
    • https://mafegajavor.weebly.com/uploads/1/3/0/4/130476146/vowupiw.pdf
    • http://kiblotto.bet/uploads/1/3/0/6/130621296/nanoxugurujividujopa.pdf
    • http://cobourgfarmersmarket.com/uploads/1/3/0/4/130435956/sigal.pdf
    • http://mysummit18.com/uploads/1/3/0/4/130435500/40b76.pdf
    • http://ssixenterprises.com/uploads/1/3/0/3/130323453/751f5895.pdf
    • http://misssupremepurityqueen.com/uploads/1/3/0/6/130621068/130621068.html#magisterium+3+pdf+google+drive
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012bd.bin
41ef1b330e3ca37a984bb84e392935a18a4b68372807ea3bc8af833812de26c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD 9560 bytes
font_01_sfnt_off00006d97.bin
d3482b78ffb396e5e58ff9238229a8090fb7e040dddc819c431f50b5aac931c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D97 16192 bytes

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