Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d987d7e376461e9…

MALICIOUS

PDF

45.0 KB Created: 2021-06-04 00:53:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3c23b323d44a78672dcc148cf5b7b898 SHA-1: 3b31b367e86dd8adf3de4f4540a2733ecc8fbefc SHA-256: 2d987d7e376461e9b8edcdbb769fa02d94905e2b62c283a11598ad2c1c03fec7
82 Risk Score

Malware Insights

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

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 0.9865

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/431946152/free-robux-only-1-step-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-roblox-toy-codes_GM431946152.pdfIn 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_004_off00005155.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5155 25840 bytes
SHA-256: 6637df857d74e8ca59c161d401308516b41c09dbb830c867f52e37741677f848
font_01_sfnt_off00008c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2D 18656 bytes
SHA-256: 070bf31dcf9002553526675ed1cd7b39f0747279791c235f0424fbc506b236c5

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