Malicious PDF — malware analysis report

Static analysis result for SHA-256 2874100df7a0f6c4…

MALICIOUS

PDF

46.5 KB Authoring application: GIMP
MD5: 24758f8420b88ea1513abccbda6eb0ab SHA-1: 35bbadfd7bae37418a4d0fba8bbcc446ed431379 SHA-256: 2874100df7a0f6c48b167ee6d9ecae9166890d6b2ea8ab58ee3809b0ddc99e2a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The 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://pofadd-voicecall.com/uploads/1/3/0/6/130603715/xotezowarebom.pdf
    • http://djfoster.ru/uploads/2020/01/28/vawasisusimoleliloj.pdf
    • http://lila.lechenienarkomanii-stavropol.ru/uploads/2020/01/28/samevubovovudazuj.pdf
    • http://adaptable.com.au/uploads/1/3/0/5/130551090/78166a2f06eae.pdf
    • http://myenterpriseinc.com/uploads/1/3/0/5/130588434/mebanidimup_jazotezoj_pelifumoza_jutuzuzuzusabu.pdf
    • https://puzilisenefij.weebly.com/uploads/1/3/0/6/130603888/8238819.pdf
    • http://juliejesternewman.com/uploads/1/3/0/5/130588923/130588923.html#anaplasma+platys+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001108.bin
2ad5fdacdcc895fdb5ee2566bdadcca2530f30981a35653862b3bb2082ae4032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1108 8012 bytes
font_01_sfnt_off00006fff.bin
2959476c5f94eab6b6b2ffd9cf8eddac6ccb1c6c7aee9290b1d2b651b3211ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFF 16040 bytes

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