Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9c8109f81f627f…

MALICIOUS

PDF

44.1 KB Authoring application: Mobipocket Creator
MD5: c4cb77e7e25281531c8ed04b5d171b11 SHA-1: a49e57eb641360293ca706346aa1d7aa6e0d8372 SHA-256: ae9c8109f81f627f0e281da392d2a040ab04d1fd8181fdf7cc4c742637c93e33
150 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests the document's purpose is to host a large number of external links, likely for SEO spam or to redirect users to phishing or malware distribution sites. The embedded URLs are the primary indicators of compromise.

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://uktvspainuk.com/uploads/1/3/0/5/130541881/3934132.pdf
    • http://smashbroscardgame.com/uploads/1/3/0/6/130604815/be951a44dba89.pdf
    • http://morganrv.com/uploads/1/3/0/6/130603847/a35ba37.pdf
    • http://brewerybooks.com/uploads/1/3/0/4/130483678/jubezabusitesi-kejobej.pdf
    • http://200jobs.com/uploads/1/3/0/6/130620836/pepuxorazivitaxurap.pdf
    • http://steeltec.us/uploads/1/3/0/5/130551089/rodebuzajojamop_bimaxam_novejam_jibob.pdf
    • http://myautologistics.com/uploads/1/3/0/5/130590265/rinosepifusazi.pdf
    • http://pacificcoastbuyers.com/uploads/1/3/0/4/130483629/lejobemo.pdf
    • http://drsba.org/uploads/1/3/0/6/130639294/bibuvudomutijo_dixaj.pdf
    • http://southtynesideagainstbullying.co.uk/uploads/1/3/0/3/130313123/sutivafupoli_zodebezul_tofew.pdf
    • http://nyforceacademy.com/uploads/1/3/0/2/130274370/5075372.pdf
    • http://rehphotography.org/uploads/1/3/0/6/130640000/130640000.html#norwegian+wood+sheet+music+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001314.bin
c35f85f33997606e642bed99d56a4868476bc68199234872e3df6da0b019a687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1314 8484 bytes

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