Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88c2c4895d013a3…

MALICIOUS

PDF

40.1 KB Authoring application: Adobe PDF Library 9.0
MD5: bc888dbc94214e9f2c2ca81586b3e50a SHA-1: 5d504f65d57ae1f707aa5db8ed0c1be9b2a7775a SHA-256: c88c2c4895d013a336ab885fff30dd8999a7bc2e03e96d08bbf7e5606e3486ab
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded links to other PDF files, a technique commonly used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The embedded URLs likely serve as a distribution mechanism for further malware or phishing content.

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 https://wajiwekura.weebly.com/uploads/1/3/0/3/130379178/jobamatij.pdf
    • http://musobap.brothersrating.com/uploads/2020/01/27/fugogisud.pdf
    • http://numutux.flyinbrasil.com/uploads/2020/01/28/1f4880237260.pdf
    • http://timothyabrams.com/uploads/1/3/0/2/130289589/38821f.pdf
    • http://nologes.macronbit.com/uploads/2020/01/28/xubexalasufu.pdf
    • http://bevudosi.houseter.ru/uploads/2020/01/27/1055335.pdf
    • http://tavil.vipiski-besplatno57.icu/uploads/2020/01/27/zenuteni-gubed.pdf
    • http://jezar.galamosaic.net/uploads/2020/01/27/b08a7.pdf
    • http://fairytalesandwar.net/uploads/1/3/0/6/130621698/vofanutuzovegasexe.pdf
    • http://dermashop.tech/uploads/2020/01/27/nedifekubulet-nowakazaja-vipevolem.pdf
    • https://gepakupasevitaj.weebly.com/uploads/1/3/0/5/130539295/2603416.pdf
    • http://loskuatro20decalifornia.com/uploads/1/3/0/6/130620958/130620958.html#anabel+hernandez+garcia+libros

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000134f.bin
4fb3ff0075d88e1e0dab6e865b63c44cb5da1ec1b85cf75d928a0de01e6d6dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134F 9224 bytes

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