Malicious PDF — malware analysis report

Static analysis result for SHA-256 db18065cb7494dc4…

MALICIOUS

PDF

40.9 KB Authoring application: Karbon
MD5: 9ac6bd727d78bc370209a11287af4442 SHA-1: c45d3954fc46a42e0065716b12c1503141bf325d SHA-256: db18065cb7494dc42ffd4ebea692df8a4c9b80a8984d218c8e67b7c49a4ed0b5
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for phishing and SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The document body, though partially corrupted, suggests a lure related to pregnancy complications to entice users to click on the malicious links.

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://miles-of-trees.org/uploads/1/3/0/5/130590047/nidasokorilew_rafab_pigazezurofepa.pdf
    • http://networkbusinessconsulting.eu/uploads/1/3/0/6/130640091/2325583.pdf
    • http://bnichicago.org/uploads/1/3/0/3/130313504/jusevijukazaku_labirivamon_bupefapodejusag.pdf
    • http://brownwoodrealestateguide.com/uploads/1/3/0/8/130815124/d224a1ee3d7.pdf
    • http://knotware.net/uploads/1/3/0/6/130605270/43641377ec6.pdf
    • http://luvofit.com/uploads/1/3/0/4/130476821/8b26100bcb4.pdf
    • http://themodestcollection.com/uploads/1/3/0/7/130739082/xizesamud.pdf
    • http://merraephotography.com/uploads/1/3/0/2/130288383/lupesum-japusikulivojer-tuwiv.pdf
    • http://stompyedits.online/uploads/1/3/0/7/130775848/nuxuwadorilage.pdf
    • http://eumid.com/uploads/1/3/0/6/130620666/fozuzumiba.pdf
    • http://wcd-hxoii64p.mgh-r.ch/uploads/1/3/0/7/130775607/130775607.html#severe+cramps+and+back+pain+during+early+pregnancy

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049f0.bin
9a66837123dff0fbbbdf55de8e2c425e62f2da2d58cc64cece03f03c64e9cb45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49F0 7916 bytes

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