Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e657aa88bbdf92d…

MALICIOUS

PDF

34.1 KB Created: 2021-07-07 14:53:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9776f25abaa6e2e051ba13d09de1dd38 SHA-1: 9783715d72e3d7ed4feebc3535b43597e5b6c52f SHA-256: 5e657aa88bbdf92d928f3fa651fb19bef040e494691af25b87950033c71e0239
82 Risk Score

Malware Insights

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

The PDF document contains multiple links to websites offering game hacks and free currency, such as 'coin-master-free-coins-hack-game-hack'. The ML classifier and PDF heuristics strongly indicate malicious intent, likely to redirect users to a site that exploits vulnerabilities or serves malware. No scripts were extracted, but the embedded URLs and document content suggest a social engineering lure to trick users into clicking malicious links.

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/406889139/coin-master-free-coins-hack-game-hack PDF link annotation
    • http://pustaka.smpmuh2yk.sch.id/repository/android-robux-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/without-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-hack-back-a-roblox-accunt_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-robux-reddit_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_off000030a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A7 22496 bytes
SHA-256: 155cce5f39827e863938495dbc61e5da867c011b53394d00ad9a6916cc7f5ccb
font_01_sfnt_off000062ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 18168 bytes
SHA-256: f6a958b5ee3bd5b31fa7bb34e70f4f188eadbb3e5a663de667095cc8c499d1ed

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