Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fa63309c70c531…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 23:05:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1cc04f8bbdd8d06c5f9a4999da75b879 SHA-1: 1c95554d5fc636b10ef2ccda904f2fe4f152c7ba SHA-256: 26fa63309c70c531b6624a42fa0b11bd73bd0c6b2ff9616353a9bf894b5db9b4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary link pointing to a "free generator / game hack" lure. This heuristic, combined with the ML classifier's high confidence, indicates a malicious intent to redirect users to a potentially harmful website. No scripts were extracted, but the document structure and embedded links strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/406889139/25-free-spins-coin-master-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pokemon-go-free-40k_GM1094591345.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-use-tiktok-for-free_GM835599320.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_off00004fd6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD6 25008 bytes
SHA-256: dbb5e2a1cf0a1e5405771baf013058c77d086f02a2baca76f6c55770f83b8136
font_01_sfnt_off00008897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8897 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9282 18144 bytes
SHA-256: e61324631e03e98c071e12442239b73d0a12fcb8243797d210d051c8d69b565d

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