Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d30db22cd96311…

MALICIOUS

PDF

37.1 KB Authoring application: QPDF
MD5: ae1fa29adb7b78992f9ac65071d2dbf0 SHA-1: b4b91a6ee1dce8c0672d6a9970b75c5b21aa2f2c SHA-256: 65d30db22cd9631156c944772af42b4773ad37f6769de16406eb7f0f64abd05c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier output strongly indicate malicious intent. The embedded URLs are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://komopuxobu.specodegda-kemerovo.ru/uploads/2020/01/28/488455.pdf
    • http://accomadationmadeeasy.com/uploads/1/3/0/6/130605275/7663267.pdf
    • https://lemopurewem.weebly.com/uploads/1/3/0/2/130291352/3153289.pdf
    • https://jikigasodejo.weebly.com/uploads/1/3/0/5/130539800/5c0ad2f7.pdf
    • http://yogakub.ru/uploads/2020/01/28/tepetukoxinemuzirora.pdf
    • https://jufinavunuzofiw.weebly.com/uploads/1/3/0/2/130271126/4884992.pdf
    • http://mindforyou.org/uploads/1/3/0/2/130289322/130289322.html#provincial+2018+equalized+assessment+report

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010ad.bin
c2c7e05bad6fb8bb8ce453421e7b627aa6bbe04275bcb90adecacd7c27892d59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD 8424 bytes

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