Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8967fcb19fa518…

MALICIOUS

PDF

42.1 KB Authoring application: LibreOffice Draw
MD5: ad3972fbca69c1ea41a1813789c8e038 SHA-1: 33ae43fbeff7cea4dce781b6df013e56f8cd6b64 SHA-256: 5e8967fcb19fa51894b8da5998c1e929b00a07b9d9902d3a2c7af677551a6483
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical rule for a link farm and a ClamAV detection for phishing. The embedded URLs, such as http://nakivumofi.monplezir.su/uploads/2020/01/28/9544858.pdf, are likely used to redirect users to malicious or phishing content. The presence of numerous external links suggests an attempt to distribute malware or phish for credentials.

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://nakivumofi.monplezir.su/uploads/2020/01/28/9544858.pdf
    • https://ripinina.weebly.com/uploads/1/3/0/4/130476401/8481198.pdf
    • http://fobujexuje.paypal-support.bz/uploads/2020/01/27/540662.pdf
    • http://thebannersheet.com/uploads/1/3/0/6/130604286/mozadigulivavulumobe.pdf
    • http://mmflackdesigns.com/uploads/1/3/0/3/130324063/vobidegovivix.pdf
    • http://torepair.ru/uploads/2020/01/29/bebavoludil.pdf
    • http://nobokab.workst.icu/uploads/2020/01/28/gajikuges.pdf
    • http://acryform.weebly.com/uploads/1/3/0/6/130604188/tekubetapewube-gosisokur-bivademujemebu.pdf
    • http://fivu.rus-snow.ru/uploads/2020/01/27/sudosuzerowugola.pdf
    • https://laroputazetus.weebly.com/uploads/1/3/0/2/130287536/zizifevuj-golufujuzab-muwifunixe.pdf
    • http://mejabimu.tarikat.ru/uploads/2020/01/28/bavaxizudifivet_difuxanezu_xiwud.pdf
    • http://nibu.kuhni-msc001.icu/uploads/2020/01/27/f4272d.pdf
    • http://thomasvasasphotography.shop/uploads/1/3/0/6/130621980/130621980.html#anesthesiology+reading+passage+ielts+answers
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000132e.bin
211fa3d24519e38649c42a9c01d883ff7c7f5c9bee00c509f6806fd643ab4bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132E 7892 bytes
font_01_sfnt_off00005d19.bin
22cd034339abe83ef100088c344c397d43dbcb1a696a587bbc5f11ca204a751f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D19 16204 bytes

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