Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08eafd3c908ce01…

MALICIOUS

PDF

46.4 KB Authoring application: PDFBox
MD5: 4b55a33a57400fa5ada315e45d110e19 SHA-1: 17c0aac25fa717d8fd41720bc892268970d3bf10 SHA-256: c08eafd3c908ce01a7f2350d5bbf556fe5abb881de55f8ebe5d830ff25af5968
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links pointing to external PDF files hosted on various domains. The heuristic PDF_SEO_LINK_FARM indicates this is a link farm, a common technique for distributing malicious content or conducting phishing. The ClamAV detection further supports its malicious nature. No scripts were extracted, but the primary attack pattern involves directing users to a network of potentially malicious URLs.

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://bestofbaliadelaide.com/uploads/1/3/0/2/130289479/bepabi.pdf
    • http://calciomaestro.com/uploads/1/3/0/2/130289504/kuxaza.pdf
    • http://bandagcint.store/uploads/1/3/0/5/130551562/17f045a120bfe2.pdf
    • http://riversidecountyhistory.org/uploads/1/3/0/5/130551981/130551981.html#flames+of+war+vietnam+battle+report

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fb9.bin
fed5bf0a29e36975b3a4c8989eae3b4886e5af21062360a314920a40db22eb4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9 8544 bytes
font_01_sfnt_off00006ed9.bin
5cf09c997d9c05832eb57b84347daf03ad75e6a49a952d81086330556321154c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED9 16288 bytes

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