Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fc9813d34c7bf1…

MALICIOUS

PDF

47.6 KB Created: 2021-06-07 05:02:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cc2bcaa0ad6fccd921cc9fcfac82c59e SHA-1: c17c2f9f21380d36c3ec81cace6c10db2497a557 SHA-256: 74fc9813d34c7bf1462e7a9e07a5a7b12a79aa1697f85a88a9a51a14ef82d03a
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 0.9832

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.tw/app/431946152/all-free-robux-websites-game-hack PDF link annotation
    • http://pustaka.stikesperintis.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/como-hacer-que-cheat-engine-funcione-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/app-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/robux-best_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/hack-client_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://collectrobuxIn 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_off0000526a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x526A 29200 bytes
SHA-256: f1452df362f288d8e6b3974b51a886a1f82af8511ef6339cd30251b5d12079db
font_01_sfnt_off00009702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9702 18508 bytes
SHA-256: f31ee3bdd3409f2903e78875bdd7e6886e3f7f7bb104198ba5456ec1b15601b9

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