Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee454f49566b3b47…

MALICIOUS

PDF

73.3 KB Authoring application: Serif PagePlus First seen: 2021-07-13
MD5: b76f20da04461e1428f638c075e1da3a SHA-1: 1f87cb029196ff98117c3fadb87bab57cde294da SHA-256: ee454f49566b3b472f3b3d74255df13cf9a4eb22e8fd88b3cc439fdb4484d2a5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flagged this file as malicious. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://northvanmucisacademy.com/uploads/1/3/0/6/130639471/butetekuloz.pdf In PDF document text
    • http://readymum.com/uploads/1/3/0/3/130324065/zumududobaxiwivavoje.pdfIn PDF document text
    • http://readcoolbeans.com/uploads/1/3/0/4/130478174/gozaxusuzodeli_larigiteme_rixuwi.pdfIn PDF document text
    • http://peldongaming.com/uploads/1/3/0/7/130740180/xuvofidamixowig_rivikexivas.pdfIn PDF document text
    • http://cubibank.com/uploads/1/3/0/6/130620624/130620624.html#class+hydrozoa+diagramIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000115e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E 9588 bytes
SHA-256: 3c7b8213a203cd3c92698bb32b2fa2c0b098272cc1ab1553e6f2ae13ca47457b
font_01_sfnt_off0000c85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85B 16632 bytes
SHA-256: 22d40befc191a26d5b9335f49c862945e86d0a6fb41c00867ea7d8a91d28ac9d
font_02_sfnt_off0000df80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF80 5560 bytes
SHA-256: c40714fb680269062b1c72712a32dc880c8f76741464b754ecb95ffc1a84e1fe

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