Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bf7a171032ac13…

MALICIOUS

PDF

34.0 KB Created: 2021-06-22 22:17:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 407dad4d91903ced35b86989ba9d621a SHA-1: 40ff312895a2a5d7c51b502a796ad463ca9f67fb SHA-256: 74bf7a171032ac13d304f35d962c8541ef3050dc2838b3d2e5906bdfded842a0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document displays a fake CAPTCHA to lure the user into clicking a link, which is a common social engineering tactic. The embedded URL points to a resource that likely serves as a download for a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://netcdn.co/app/431946152/how-to-get-a-shirt-for-free-roblox-game-hack PDF link annotation
    • http://elitesoftsolutions.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/case-clicker-cheats-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-the-crazy-elevator-free-toilet-dlc_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-oprewards-hack_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-robux-site-surveys_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/the-streets-roblox-exploit-free-easy_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-roblox-card-numbers_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-mod-hack-apk-download_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-free-d_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED0 21952 bytes
SHA-256: a125f383da75c20e2a32244548ea5cc3c0b0eb7eef53cbba1e6d0a8c42a7675c
font_01_sfnt_off00005f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F41 19204 bytes
SHA-256: 4cc2c79f052ac152b33b5a889bf2b579562d3bb3656028e7d4a362e9c9342d14

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