Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b3323c690aaaf0…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 11:35:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3b7c7d5733516a3a75b25f4e85bc3ece SHA-1: dda9ee05b18351614a7831cbef4a59c8b9462b9d SHA-256: 88b3323c690aaaf0df5f3794f412a8bc9aa0da9673b2110c6786bd7ba94884f0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game hacks, directing users to the malicious URL http://netcdn.tw/app/431946152/roblox-play-now-for-free-game-hack. This URL likely serves as a redirector to a malicious payload or phishing page. The presence of multiple game-related URLs and the ML classifier's high confidence indicate a malicious intent to deceive users. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a social engineering attack.

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.tw/app/431946152/roblox-play-now-for-free-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/free-pastebin-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-cool-stuff-for-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-accounts-vomvom2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/exploit-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-cheat-commands_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-headphones-catalog_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-tickets-cheat_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-ultimate-driving-cheats_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-group-payouts_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-card-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-gravity-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-gift-card-codes-2021-on-images_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/reddit-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-account-free-trial_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-free-someone-in-prison-life-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
stream_002_off00002dd3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DD3 22328 bytes
SHA-256: e32d807a751e2fa7777dbe55cb4f0d370317cd4d8f6abd4f2684740d58817f00
font_01_sfnt_off00005f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F96 19148 bytes
SHA-256: 686d2062e78f1df2d276c91edbad0d84cda926d52b0f640b8f5b427429c15233

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