Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8eb395cc89f2dd0…

MALICIOUS

PDF

48.6 KB Authoring application: SWFTools
MD5: f82a603f0d23e0f2af5d881e0176361e SHA-1: f829cb78df36ab86f76d39d74ca461f5653cca6a SHA-256: c8eb395cc89f2dd0123faa023aaa2ee8d31f4ee63b7b2cf7145b7ca9da223716
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of embedded URLs pointing to external PDF documents. This behavior is indicative of a link farm designed to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery via these external links. No scripts were extracted, and the document body was heavily obfuscated.

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://test-person-reg.com/uploads/2020/01/28/bozuwelu_vimib_joguti.pdf
    • http://sloanemorocco-efolio.com/uploads/1/3/0/6/130604576/3490905.pdf
    • http://structureinsurancegroup.com/uploads/1/3/0/5/130551809/magejuwizuwoj.pdf
    • http://artfullofjoy.com/uploads/1/3/0/4/130491752/vijatigazu.pdf
    • http://mindfuldemocracy.org/uploads/1/3/0/5/130550775/woxawotetaxilewisuge.pdf
    • http://southerngothiccollective.com/uploads/1/3/0/6/130620840/ca6d0d1.pdf
    • http://martinvizzina.com/uploads/1/3/0/6/130604244/3233334.pdf
    • http://midcitycarriages.org/uploads/1/3/0/4/130489331/sovogasozolopabo.pdf
    • http://morganmwilliams.com/uploads/1/3/0/6/130621036/wigajozukex.pdf
    • http://pelabarba.com/uploads/1/3/0/5/130543600/bubikaxexov.pdf
    • http://envirenu.biz/uploads/1/3/0/2/130291592/magevuvemubujoda.pdf
    • http://fitness-private.com/uploads/1/3/0/3/130313459/ecbe0.pdf
    • http://misssupremepurityqueen.com/uploads/1/3/0/6/130640199/130640199.html#arkanoid+2+nes+rom

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001510.bin
cdc8600a985e18964afe4041984a35b0d3ae0e87ce6e6ed53f652117b9ada92c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1510 9844 bytes
font_01_sfnt_off00006e72.bin
b7742dd78f920381d63326997626eb9d89b23a2fcae4512cdb7c04b4b0ea796e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E72 2900 bytes
font_02_sfnt_off000077bd.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BD 16036 bytes

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