Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd19b6968548590…

MALICIOUS

PDF

43.6 KB Authoring application: PDF Studio
MD5: 44873eb6bbb65f71f496686a31e91fcc SHA-1: aacf7f5f6f01fa1125c46aca01070f2f2ae69dab SHA-256: 6cd19b6968548590f767c4dcc3dd0f885f4f16f05309fdbd7ee85d0dbb860bdc
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical finding for a link farm containing 14 external PDF links. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest a phishing or redirection attempt, likely to deliver a second-stage payload.

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://cltlabschool.weebly.com/uploads/1/3/0/2/130289002/badb58e6585a43c.pdf
    • http://gottaluvthatbling.com/uploads/1/3/0/6/130604598/jomijenakevoz.pdf
    • http://sportrock.org/uploads/1/3/0/6/130620309/e2f3de.pdf
    • http://litclubbs.com/uploads/2020/01/28/fasovotew-tafipeni-wesaraxawudokoz-removad.pdf
    • http://daniellesmakeupcreations.com/uploads/1/3/0/4/130436173/3f4e234d.pdf
    • http://mrkellyshistory.weebly.com/uploads/1/3/0/6/130604179/6218494.pdf
    • http://sewifuga.dimeka.ru/uploads/2020/01/29/7183108.pdf
    • http://2030portal.com/uploads/1/3/0/3/130323392/130323392.html#bsc+agriculture+1st+year+notes+pdf+i
    • 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_off0000132d.bin
d65ecd71e1fc3ae2b3d7971b3158d080c88dcb15221046b65d759bbc5d70bcbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132D 8556 bytes
font_01_sfnt_off000062c7.bin
dcd79678780f9df101063a0971d284418ebab3d6a6f5b539deea1ecddc86f952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 16440 bytes

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