Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b2b90e5f041df9…

MALICIOUS

PDF

45.3 KB Authoring application: Nitro PDF
MD5: 04d6c561d2e700e90333431f7ed62393 SHA-1: a2aa2ef67c3c3169d834a0e8a3e909226205b0f2 SHA-256: 00b2b90e5f041df9a4b69854125964a01161c823b95836a14c7910cddb8cc247
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This behavior is consistent with a phishing or redirection campaign designed to lead users to malicious content. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nugriot.com/uploads/1/3/0/3/130379151/pudide.pdf
    • http://mystrugglemyvictory.com/uploads/1/3/0/6/130621663/863d215124e684.pdf
    • http://operationalysha.com/uploads/1/3/0/3/130323209/puxasuwurev.pdf
    • http://xupoxopuzu.thaimanohra.com/uploads/2020/01/29/4943842.pdf
    • http://dulcebesitos.com/uploads/1/3/0/5/130550768/4897512.pdf
    • http://roninok.copyrightcontact-100000659807.com/uploads/2020/01/28/zevoguw-tozinikifirebed-niwodaxe-kololel.pdf
    • http://simply-sarah.co.uk/uploads/1/3/0/2/130272580/kemixajirizikewog.pdf
    • http://smith-re.com/uploads/1/3/0/7/130740193/abbf426664c.pdf
    • http://subordominant.com/uploads/1/3/0/6/130603756/ecc636f6b297b.pdf
    • http://witibim.imakerlab.club/uploads/2020/01/28/wenupimigifaludalek.pdf
    • http://annamaija-rissanen.com/uploads/1/3/0/6/130622032/3ef776.pdf
    • http://laganbuildingsolutions.net/uploads/1/3/0/5/130543653/623980224c52.pdf
    • http://mikeintucson.com/uploads/1/3/0/3/130323227/130323227.html#map+ark+valguero
    • http://linux.thai.net/projects/fonts-tlwg
    • http://www.thaitux.info

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001da7.bin
dcc3473d1d7fa8f5fe46c82662baca9d61d7413c97481bec6c501631f41b1874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA7 13164 bytes
font_01_sfnt_off00003e17.bin
10fe612ff67b9248f32b39516c6931a3c521d3077aa41cc4f44cfaae0f909493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E17 8324 bytes

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