Malicious PDF — malware analysis report

Static analysis result for SHA-256 4297afed08ab6f60…

MALICIOUS

PDF

49.1 KB Created: 2021-06-03 05:24:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d16810bb56ef5edd3f6bb9c8d9b55415 SHA-1: e4e19a37648a40f54f5435b3766944c38b1547c3 SHA-256: 4297afed08ab6f60d3efd9e5f672042d6da458e92c03ac75be9f4f4dfe49c57b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The document body, though heavily obfuscated, contains a URL that aligns with this finding. This suggests the document is designed to trick users into visiting a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/daily-free-spin-coin-master-link-game-hack PDF link annotation
    • https://library.sttbandung.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/worst-client_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/mcpe_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-android-root_GM406889139.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_004_off000050e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E0 27108 bytes
SHA-256: b347c9b0325fd42fb618a55137c7539d51c43a835b5991763d19875c20008dd1
font_01_sfnt_off00008f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4E 4020 bytes
SHA-256: 7d3617ecf51e14e6cffc9372c4441988c3b6cb3ea010f7512aee6af842ef388d
font_02_sfnt_off00009cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD9 18476 bytes
SHA-256: 13087f23ced5a654764a402ace47e06b7ceeb886891228a443e0cb07dd9c4176

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