Malicious PDF — malware analysis report

Static analysis result for SHA-256 193ef09afac3527d…

MALICIOUS

PDF

46.4 KB Authoring application: Mobipocket Creator
MD5: d1d0d90a37cc2b6352264ced445ec48f SHA-1: c89ffef58c51350a39408c02ce3047168003ecb3 SHA-256: 193ef09afac3527ddc2f7ee9dfdd699875d3b7c07e98e03c9d77d6c380c9b692
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical rule for a link farm and a machine learning classifier indicating maliciousness. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly suggests a phishing or redirection campaign. The embedded URLs, despite appearing in a document body discussing biology, are likely part of a scheme to lure users to malicious sites.

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 https://ronijuwe.weebly.com/uploads/1/3/0/4/130435578/827f4f6f.pdf
    • http://artofitness.com/uploads/1/3/0/4/130483937/zedufugamabilopute.pdf
    • http://ponyenzo.com/uploads/1/3/0/5/130588244/1063414.pdf
    • http://mineralintelligencecapital.com/uploads/1/3/0/2/130272571/nawivabezafi_gisefifix.pdf
    • http://armadasport.com/uploads/2020/01/28/pomifupuvibij.pdf
    • http://splashsteamboat.org/uploads/1/3/0/2/130273915/2be9aa1c.pdf
    • http://979praisefm.com/uploads/1/3/0/6/130620390/0165ab6817d.pdf
    • http://ndchair.com/uploads/1/3/0/4/130489253/130489253.html#digestion+and+absorption+of+lipids+biology+discussion
    • 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_off00001170.bin
4cef285e697da553b656801bf05d49df167d067ffa4f3d1a46d75462d4aa12d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1170 8084 bytes
font_01_sfnt_off00006a06.bin
062abeeb0630068c9ebda4cd69880ba7d22c023ef851e82e77d1a768bfa0705b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06 17648 bytes

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