Malicious PDF — malware analysis report

Static analysis result for SHA-256 119e156ec5f9242f…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 12:06:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4d87ff418481f3a7d257efca57c3afa9 SHA-1: 41427a32f3b047fe66152b767c492044c42d5282 SHA-256: 119e156ec5f9242f62658b1e2c77d7ae210afb712440202fd903d015ec66017c
122 Risk Score

Malware Insights

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

The PDF document contains a lure for game cheats and displays a fake CAPTCHA, indicating an attempt to trick the user into interacting with malicious content. The embedded URL points to a site offering 'roblox-rtd-awakening-cheats-game-hack', which is highly suspicious. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it may leverage embedded JavaScript or exploit vulnerabilities to redirect the user to a malicious site for further payload delivery or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-rtd-awakening-cheats-game-hack PDF link annotation
    • http://library.ulb.ac.id//repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/festive-shoulder-owl-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pubg-uc-image_GM1330123889.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hackear-roblox-escape-prison_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-pocket-edition-hack_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_004_off00004d46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D46 26208 bytes
SHA-256: 2c303d9447bb998d78f61b7dfa9b18b218865068257284ce986ae3f2ed9c7bf8
font_01_sfnt_off000088b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B7 19200 bytes
SHA-256: 0753c23b3cf7d22f0a9147d9e817721a02509b14bb9e62f85481614a20468871

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