Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abe9e399a640047…

MALICIOUS

PDF

37.1 KB Authoring application: pstoedit
MD5: c51bd8615b8ff332a240da20716842d1 SHA-1: dbc70aafabd05e63320e783f6862d366ff042fc3 SHA-256: 6abe9e399a6400476c50233e1811e40294ddd4c760e27bd87369775c5bef2e1c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, and it contains a large number of embedded external links. The heuristic 'PDF_SEO_LINK_FARM' indicates that the PDF is designed to host a mass of external links, with the first observed URL being http://ladavisbooks.com/uploads/1/3/0/7/130775734/8930653.pdf. This suggests a tactic to manipulate search engine results or distribute malicious content through these links.

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://ladavisbooks.com/uploads/1/3/0/7/130775734/8930653.pdf
    • http://mizzoureview.com/uploads/1/3/0/7/130738765/xomudagejajilijugu.pdf
    • http://stillparade.com.au/uploads/1/3/0/8/130813317/dubanam.pdf
    • http://4dography.com/uploads/1/3/0/6/130621178/gapuxubibikiji.pdf
    • http://www.thelaguesthouse.com/uploads/1/3/0/6/130639476/xidunezapo.pdf
    • http://solonterrasgolf.com/uploads/1/3/0/7/130740387/7560513.pdf
    • http://exerciseprescribinggyms.com/uploads/1/3/0/8/130813786/392c67e7a.pdf
    • http://ntwstudioart.com/uploads/1/3/0/6/130604522/1997204.pdf
    • http://www.thirstquencherneckware.com/uploads/1/3/0/6/130639662/eefd55fe8ebcd2b.pdf
    • http://poshexecutivetravel.com/uploads/1/3/0/3/130323535/3334059.pdf
    • http://lavanderiaspadiniromacentro.com/uploads/1/3/0/2/130289270/domojiki.pdf
    • http://www.freechoicelearning.org/uploads/1/3/0/7/130776023/130776023.html#tecnicas+de+extraccion+de+aceite+esencial

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a4e.bin
e4947bbb837e4d76d2ab915224d208ad082020f28db59a7deb23ae0ea659d79b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A4E 8472 bytes

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