Malicious PDF — malware analysis report

Static analysis result for SHA-256 48cbb35723766a96…

MALICIOUS

PDF

46.5 KB Created: 2021-05-11 02:41:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4086ac4d401ce1a98b94bf652f41b048 SHA-1: 6891ff7509ddf5e3d939fc2f2c08a20aad84afc3 SHA-256: 48cbb35723766a962c37e3fba4b0875eed2f7833096c4fb6126a2e1f08224539
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, with a primary focus on 'game hacks' and 'free spins' lures. The ML classifier and specific heuristics strongly indicate malicious intent, likely to redirect users to sites that host malware or phishing content. Although no scripts were directly extracted, the PDF structure and embedded links suggest a social engineering tactic to trick users into downloading or visiting malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/406889139/coin-master-free-spins-ios-2021-game-hack PDF link annotation
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning-mts-almakmur.com/__statics/gudangsoal/files/promo-codes-for-free-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_off00004b9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B9E 26160 bytes
SHA-256: e117d2efa4c1e51952883960d5d9f4236f7f26aec22c3e13ebb81734cb0b4533
font_01_sfnt_off000087c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C3 3292 bytes
SHA-256: 477806d1358eeb108b2f77e5db16f62209776f4a0527a6ba40ad8c603ac6de5f
font_02_sfnt_off0000933d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x933D 18288 bytes
SHA-256: 2b6efa5e62152ff8c49d64075f52aeeb5d732445f14fabab56fec2f8f3dafea1

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