Malicious PDF — malware analysis report

Static analysis result for SHA-256 38959b7f2bbd38a9…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 01:56:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0928ef92b9cb23ad894756e71435dc3c SHA-1: e15c52e46b3960809c517e3ad3586fa1294b6ffa SHA-256: 38959b7f2bbd38a9936a7c2dae0542965af8fa2d505e7c123a082b1f0099e033
82 Risk Score

Malware Insights

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

The PDF file contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains references to game hacks and the malicious URL, suggesting an attempt to trick users into visiting a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/479516143/mcpe-game-hack PDF link annotation
    • https://mayunisma.sch.id/__statics/gudangsoal/files/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/blox-fun-info_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-robux-no-human-verify_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_003_off00004ced.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CED 25324 bytes
SHA-256: e3d6cf4418fd9373d2b43213a7d7d69db85e5c94c2fc6bfefbace30cb17690ec
font_01_sfnt_off0000866a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866A 17292 bytes
SHA-256: bad2551fb36a1ff37c0a2928a0b0bdd7baf715808b6c6c89c87aa6c39ddc14cd

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