Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b913bf1f1602f43…

MALICIOUS

PDF

31.5 KB Created: 2018-06-11 08:21:44 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: f30394e1e579a05dd84815901f0d7454 SHA-1: f095e13a61e7b78ae1e16ca9d225f6edfa1a3cdd SHA-256: 4b913bf1f1602f43e969fcc2d4707e6e65b2a41f42e3b8920317da93f25d2d61
72 Risk Score

Malware Insights

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

The file is identified as a PDF dropper by ClamAV. The document body contains a call-to-action phrase and prominently features URLs that appear to be download links for a PDF file. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the lure mechanism. The primary malicious URLs identified are http://uncpbisdegree.com/download3.php?q=the-fall-dismas-hardy.pdf and http://uncpbisdegree.com/download4.php?q=the-fall-dismas-hardy.pdf, which are likely used to deliver the secondary payload.

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-9018568-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9018568-0
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://uncpbisdegree.com/download3.php?q=the-fall-dismas-hardy.pdf
    • http://uncpbisdegree.com/download4.php?q=the-fall-dismas-hardy.pdf
    • https://www.johnlescroart.com/books/
    • https://www.johnlescroart.com/
    • https://www.bookseriesinorder.com/john-lescroart/
    • https://www.bookseriesinorder.com/authors/
    • https://ipsum.im/
    • http://www.brooklineconnection.com/history/Facts/Resurrection.html
    • https://1mbed.com/
    • https://mybestruns.com/race_stats.php
    • http://riverside-resort.net/1/the-new-politics-of-financing-the-un.pdf
    • http://riverside-resort.net/1/trade-theory-question-papers-n2.pdf
    • http://riverside-resort.net/1/the-low-gi-vegetarian-cookbook.pdf
    • http://riverside-resort.net/1/sport-marketing-4th-edition.pdf
    • http://riverside-resort.net/1/southern-pipe-greenwood-ms.pdf
    • http://riverside-resort.net/1/surface-area-and-volume-pi-key-tesccc.pdf
    • http://riverside-resort.net/1/the-bmw-i3-rescue-guideline.pdf
    • http://riverside-resort.net/1/simile-answer-key.pdf
    • http://riverside-resort.net/1/simple-etiquette-in-japan.pdf
    • http://riverside-resort.net/1/the-twenty-years-crisis-1919-39.pdf
    • https://www.barnesandnoble.com/w/poison-john-lescroart/1126896517
    • https://en.wikipedia.org/wiki/John_Lescroart
    • https://www.barnesandnoble.com/w/hope-amanda-berry/1120876088
    • https://en.wikipedia.org/wiki/List_of_biographical_films
    • https://y.qq.com/
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=ZH-CHS_EN&a=https%3a%2f%2fy.qq.com%2f
    • http://www.loot.co.za/index/html/index3385.html
    • http://www.loot.co.za/index/html/index4234.html
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=FR_EN&a=https%3a%2f%2f1mbed.com%2f
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409
    • https://go.microsoft.com/fwlink/?linkid=868922
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409
    • http://go.microsoft.com/fwlink/?LinkID=617297

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004036.bin
1261a4c786b824086ebcc7fcd0cdd0ebb9990fbd8d15296bffce251ebd9df432
pdf-font-stream PDF embedded font (sfnt) at offset 0x4036 10652 bytes
font_01_sfnt_off000061e8.bin
2ce0d3bb47c87fd7d33b17f0a7545f87a6a81459cc61e4e1efda2307e93b3ec9
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E8 6684 bytes