Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ef4948acb9ef3c…

MALICIOUS

PDF

41.3 KB Created: 2021-05-20 00:31:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 10fc8cfaf04d16ca74b71dd8a8a3787b SHA-1: 219db07b71e6ed30b2547c45bb8a130a36574efb SHA-256: 90ef4948acb9ef3cfe25a0cf82587db913f57598a6da1785a996980f348bb597
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/835599320/how-to-get-tiktok-free-followers-game-hack PDF link annotation
    • http://muslib.unmus.ac.id/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/mc-update_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pubg-uc-qiymtlri_GM1330123889.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/tiktok-free-coins_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • https://hackernoon.com/tiktok-free-fansIn 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_003_off00004758.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4758 24908 bytes
SHA-256: 264418875bc3a0f01eb0aa7fe1acb44a085a64af441e00fe8bc61dc5ac946ada
font_01_sfnt_off000080e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E5 17692 bytes
SHA-256: 06d44fe381baaea783ebf6dde4c282656a4fbdb1737effc979f5fb2d08437a4b

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