Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6e4d84ebe1315d…

MALICIOUS

PDF

42.0 KB Authoring application: Karbon
MD5: 79b59ff66644b4f18b0714f300da6a44 SHA-1: cc841f07fc1da49b5fa85cef921f8eab3737eab0 SHA-256: 5b6e4d84ebe1315d34e9f9a551c532164a311bb0d3a3077e7459ed8d71ea3641
160 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The document body contains text related to 'Current Affairs June 2019 PDF' and a heuristic identified a link farm with 20 external PDF links, suggesting a lure to download further malicious content. No scripts were extracted from this sample, but the presence of numerous embedded URLs points towards a campaign distributing multiple malicious PDFs.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.gopml.com/uploads/1/3/0/4/130483576/jafaz.pdf
    • http://www.basicbibleguide.com/uploads/1/3/0/4/130435844/romotijuligerabazeta.pdf
    • http://www.the-catholic-gift-shop.com/uploads/1/3/0/8/130814200/17cc6c02.pdf
    • http://mymassagehub.com/uploads/1/3/0/7/130739462/zumiwosatuw.pdf
    • http://nylarose.co/uploads/1/3/0/2/130287881/277f483651e4.pdf
    • http://guywithbackpack.com/uploads/1/3/0/5/130588244/959503.pdf
    • http://reactgaming.org/uploads/1/3/0/7/130776388/327d898c.pdf
    • http://kristenfong.info/uploads/1/3/0/6/130639123/8263430.pdf
    • http://more2dance.com/uploads/1/3/0/6/130621746/sofotavepumukor_kapiga_bufigova_mususirowu.pdf
    • http://nevenann.com/uploads/1/3/0/5/130588232/gufuju.pdf
    • http://liduoguojiyulehuisuo.br3h.com/uploads/1/3/0/4/130479008/130479008.html#study+iq+current+affairs+june+2019+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003f58.bin
b0a6a33381002d1c379ca931d660fe98df7a73518421c8b234b9dc16af60e95a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F58 2696 bytes
font_01_sfnt_off00004b99.bin
508df2430f67c1440661e2392b8cbc4120df38d8a1aabccce50a32ec7af7db14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B99 8848 bytes

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