Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a3b3d0e56aa25e…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 16:41:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1b8ec8ab5eb58643ddf757d37026a9cd SHA-1: abeec7ac9fbb69d417c21fb3ac57980d74b62ea2 SHA-256: c0a3b3d0e56aa25e2487f05e4022a0f7f378135ae394e7e5d1a42e1146914d58
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free generators, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site for downloading further payloads or for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/how-to-play-minecraft-for-free-on-computer-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-retail-tycoon-hack-save-game_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/if-everything-on-roblox-was-free-part-2_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-money-for-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/blox-rewards_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/descargar-roblox-hackeado-para-android_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-free-for-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-roblox-on-pc_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-make-a-free-minecraft-account_GM479516143.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
font_00_sfnt_off00002e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4F 21512 bytes
SHA-256: c5d928201e1775c2d793fd7abf0db3784cbf6a7f1d75fe2ec46d7d7769531860
font_01_sfnt_off00005d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D38 19148 bytes
SHA-256: 6b08e71198e1ac288a735bc7f4f38f61d1c0f7b7ed00106923474c217010c6bd

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