Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e3e45773786b1e…

MALICIOUS

PDF

43.3 KB Created: 2021-05-19 10:56:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a2da17fcd3a9db2bd45934ee38982708 SHA-1: e285ca16a256df08e11cddbce85e25d9ed6ccd8a SHA-256: b4e3e45773786b1eb49816aa291dd1c893e7edcf5cc6980f1eb11dddbab90074
122 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' and presents a fake CAPTCHA to trick users into clicking a link. This link, 'https://netcdn.xyz/app/431946152/make-robux-game-hack', likely leads to the download of a second-stage payload. The presence of multiple game-hack-related URLs suggests a common theme for user engagement.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • 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 https://netcdn.xyz/app/431946152/make-robux-game-hack PDF link annotation
    • http://jdlrealty.ca/images/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://jdlrealty.ca/images/what-tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://jdlrealty.ca/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://jdlrealty.ca/images/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://jdlrealty.ca/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://jdlrealty.ca/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://jdlrealty.ca/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://jdlrealty.ca/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://jdlrealty.ca/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://jdlrealty.ca/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://jdlrealty.ca/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://jdlrealty.ca/images/pokemon-go-free-xp_GM1094591345.pdfIn PDF document text
    • http://jdlrealty.ca/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://jdlrealty.ca/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://jdlrealty.ca/images/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://jdlrealty.ca/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://jdlrealty.ca/images/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://jdlrealty.ca/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://jdlrealty.ca/images/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://jdlrealty.ca/images/minecraft-pe-apk_GM479516143.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
stream_003_off00004856.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4856 26512 bytes
SHA-256: dc34abb07dbb49e46fd8f2469d87873c264bc050d246edec206747b0952d7ebb
font_01_sfnt_off00008630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8630 18444 bytes
SHA-256: d485cf64ce85db08f49cebe049b1af1977bd392e7b632f71036820545e301f0d

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