Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4e6a0d0443751c…

MALICIOUS

PDF

36.3 KB Authoring application: LibreOffice
MD5: 04f3f9459be4cf3b18d9512c286aad33 SHA-1: 6ea3ceee994fc2e7593668a1ec223843dd3b1fbc SHA-256: ae4e6a0d0443751cd076d8bd9c6ce474484e5d2c9ce6cce72d249fc6166a2c76
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The critical PDF_SEO_LINK_FARM heuristic indicates the document contains a large number of external links, with the dominant host being enjoni-cafe.com. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious classification. The embedded URLs point to various PDF files on different domains, suggesting a coordinated effort to redirect users. The ML classifier output of 0.999819 strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://enjoni-cafe.com/uploads/1/3/0/5/130551140/ditimunilaxosezukam.pdf
    • http://blackbusinessexpo1.com/uploads/1/3/0/7/130776197/b11a9.pdf
    • http://growlingsteph.com/uploads/1/3/0/3/130323158/giposox.pdf
    • http://baweriku.profial-ug.ru/uploads/2020/01/29/paxap.pdf
    • http://cfthomas.com/uploads/1/3/0/4/130489536/130489536.html#multistep+synthesis+of+tetraphenylcy

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000101c.bin
1f0e3db3c4fc8e94e7aaa3509d15976d207c79fe561ced327bb73dc3b3c3151c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101C 8464 bytes
font_01_sfnt_off00004725.bin
8525ee7d27cbb4c9a8daaca9e1736245a4c0232412408609c87b09b5bb70abb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4725 16172 bytes

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