Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45b5f7030e4276d…

MALICIOUS

PDF

47.5 KB Authoring application: Mobipocket Creator
MD5: cde2524b881428067ea607a7fb00ea2a SHA-1: 3323f4b42f07ea39941d1bbf8da2c97821b45ed8 SHA-256: e45b5f7030e4276d39efd1f9c3ba2179d01ee60ad9288de1350a2695b7b37bdf
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for PDF_SEO_LINK_FARM. A high-confidence ML classifier and ClamAV detection further indicate maliciousness. The primary IOC is a direct IP address link, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://95.217.124.69:80/uploads/2020/01/27/rekesitawozepi.pdf
    • http://monuem.org/uploads/1/3/0/2/130272571/8147149.pdf
    • http://taosabi.com/uploads/1/3/0/5/130545681/datofolij.pdf
    • http://letterdetectives.com/uploads/1/3/0/5/130539325/zideruzakexef_titevuluwo_warikulajif.pdf
    • http://8200doral.com/uploads/1/3/0/6/130604779/lepadideker.pdf
    • http://ourcata.net/uploads/1/3/0/5/130588847/6500416.pdf
    • http://beingself-centered.com/uploads/1/3/0/6/130620966/130620966.html#baby+birthday+song++video

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010c5.bin
ee6347139d25d36081509509408e8fbb682d8bd5af34a322084cd565f6295947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5 7980 bytes
font_01_sfnt_off00005acb.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACB 16036 bytes
font_02_sfnt_off00006f9c.bin
090db1e209db4033a89952772c27c9075f5cb9177e2acb98650840534515fef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9C 8160 bytes

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