Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb88c86bf892722d…

MALICIOUS

PDF

43.8 KB Authoring application: Adobe PDF Library 9.0
MD5: c9600e870a348163df1e5ba8bb410e83 SHA-1: 60b96dbeeb416471a7e6e9ebe0cd598b7b07b121 SHA-256: eb88c86bf892722d09cc384d1e971d6980f525c17e374853af985f8bab65c99e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent. The document body contains seemingly random text about bacteria and cells, likely as a distraction or to bypass basic content analysis.

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://jordanlosesweight.com/uploads/1/3/0/4/130488500/danegokizolinukizol.pdf
    • http://solutionfocusedtherapys.org/uploads/1/3/0/4/130436207/wavakasobo_gapuka.pdf
    • http://lucernervpark.com/uploads/1/3/0/6/130605504/576a049341e.pdf
    • http://greenlighttransit.com/uploads/1/3/0/2/130272513/xutas.pdf
    • http://cordillerastonedepot.com/uploads/1/3/0/6/130620217/3893478.pdf
    • http://negsbestthing.com/uploads/1/3/0/6/130639412/wawosutela.pdf
    • http://mysoundcollective.com/uploads/1/3/0/5/130551859/130551859.html#bacteria+is+a+unicellular+organism

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010d2.bin
404688d810e2498b17d8202a596ca216923b4e3f65cdb30a13752992d2d19a26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2 8056 bytes

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