Malicious PDF — malware analysis report

Static analysis result for SHA-256 e159a2e9f9ef879d…

MALICIOUS

PDF

51.5 KB Created: 2021-05-11 05:28:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a8fdd6b2e3cbf791af872a1e7baf3f41 SHA-1: d9142d8833b3afd69bede5923d4cc6f273fde1e6 SHA-256: e159a2e9f9ef879da7e5253cedaaaada2bd2f2d85ab6bf7a4ca7393cb03aeef3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed to lure users into clicking on links related to game hacks and generators. The primary URL, https://netcdn.xyz/app/431946152/roblox-devil-game-hack, is identified as a redirector to potentially malicious content. The presence of these lures and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful websites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

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/431946152/roblox-devil-game-hack PDF link annotation
    • http://opac.library.uib.ac.id//repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004904.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4904 36428 bytes
SHA-256: bb073d55e7350444ca7ae09abb9e6738b62722515e09f52308757fe528813e1d
font_01_sfnt_off00009aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA7 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B9 18184 bytes
SHA-256: 228d9baa03aba80999033b04d18df637c8a6ae95d309aac9b6611bd5d5156bd2

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