Malicious PDF — malware analysis report

Static analysis result for SHA-256 b720a9d0af8da3a2…

MALICIOUS

PDF

49.4 KB Authoring application: Mobipocket Creator
MD5: 2156175777bb3783238b7d61240da7c0 SHA-1: 4bbfd4f16ec70990b230a292220b504805181bdc SHA-256: b720a9d0af8da3a2a92f5416a03cd45e82c1486697c484b3e29b31bc0532e162
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to external PDF files hosted on various domains. This technique, identified as a 'PDF_SEO_LINK_FARM', is often used to obscure malicious redirects or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://tophatalgarve.com/uploads/1/3/0/5/130589416/lufepevexejabutoki.pdf
    • http://fil.audiostart21.icu/uploads/2020/01/27/tizurexul.pdf
    • http://monarchacquisition.com/uploads/1/3/0/2/130288486/nupodevaranazuk.pdf
    • http://vehicleloanusa.com/uploads/1/3/0/4/130476200/9389614.pdf
    • http://myskiped.com/uploads/1/3/0/5/130543148/0321527.pdf
    • http://rajadiveisland.com/uploads/1/3/0/3/130379597/jewarojotasolo_jaguvefulo_pobidagabedeme.pdf
    • http://skylinesjewellery.com/uploads/1/3/0/6/130604505/mepow.pdf
    • http://obviousfraud.com/uploads/1/3/0/6/130604034/88e63816.pdf
    • http://mentoringfutureleaders.com/uploads/1/3/0/7/130776067/jadujigovepuvu.pdf
    • http://monarchrev.com/uploads/1/3/0/6/130621509/2891543.pdf
    • http://nowator.eu/uploads/1/3/0/7/130776132/130776132.html#hawaii+volcanoes+national+park+map+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001472.bin
65a3fd1ebb5cab0014467387c888c45d13aa4b3363f98ff072e5489e03907d64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1472 8956 bytes
font_01_sfnt_off00007b60.bin
7452b6b49b2d67df973eecb7580c7a2fe344bf55d7b957b3ade50b6969c50269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B60 16068 bytes

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