Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d44fa1ed4634b2e…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 08:13:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6a49403bddc7cc3bc3943d956365f41c SHA-1: dfb767d5a761be7d835cf92e1e692a7ef4154283 SHA-256: 5d44fa1ed4634b2ec1ea3ba1153b0ec96951d8440e5926e6d8212d529a625294
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to 'free Robux' and game hacks to entice users to click on a malicious URL. The ML classifier strongly indicated maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the embedded link. The document likely serves as a phishing or scam document, directing users to a site that may host further malware or attempt credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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-free-robux-on-mobile-easy-game-hack PDF link annotation
    • http://elibrary.smknesbu.sch.id/repository/cheat-engine-roblox-dbor_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/cool-backgrounds-roblox-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/pastebin-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/dantdm-roblox-shirt-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/cheat-roblox-jailbreak-2021-money_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-rc7-free-account_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-para-roblox-final-stand_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-the-hacker-egg-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-group-funds-on-roblox_GM431946152.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_off00003017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3017 22228 bytes
SHA-256: 90f14a49f7c92a65546745e167a8049af1d751154183912a5a5cdeff9b182083
font_01_sfnt_off00006139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6139 19556 bytes
SHA-256: 5d6ce19be76e74da427bc3d46d715c23ec8f89f5a2fa4ea427819cacabead8c4

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