Malicious PDF — malware analysis report

Static analysis result for SHA-256 5013f8f15aec851f…

MALICIOUS

PDF

48.6 KB Authoring application: OpenOffice Draw
MD5: ccf3b5da5b5977928c4062df8c3b3173 SHA-1: 0105103f6fdf25a2077aac3f6e4ab538b7de06cc SHA-256: 5013f8f15aec851f717763ac682aa6ddf58dbd3bcdd2ef191678cd9fa3b398ff
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. The embedded URLs are the primary indicators of compromise, likely serving as a redirection mechanism to malicious content or phishing pages.

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://dobikeplan.com/uploads/1/3/0/5/130551434/52df6.pdf
    • http://nissajackman.org/uploads/1/3/0/5/130589083/f4bf8.pdf
    • http://dhhstheatre.org/uploads/1/3/0/2/130289233/mufomoxuvi.pdf
    • http://barrons-independent.com/uploads/1/3/0/5/130539875/baradiwexunizaz_jozira_bosejiwet_xagabigi.pdf
    • http://adulosangeles.com/uploads/1/3/0/3/130323206/zirubawelakute.pdf
    • http://niagaraadvantage.ca/uploads/1/3/0/5/130550971/zifojenur.pdf
    • http://americaninfousa.net/uploads/1/3/0/6/130639976/130639976.html#la+times+crossword+answers+grid

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000114c.bin
4295f2b38da8dbe721dfeffd8df5ca9c2c25b82aaef6c3eb31802c60f9c3be2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114C 8908 bytes

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