Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bc2fff639f39cf…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 20:27:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f07a1e3923ee60c5fdecbeff67dac0b9 SHA-1: e7663ffeca2ef06fbdaef433ab541ddb81e207d7 SHA-256: 64bc2fff639f39cff433ee66b474bb7675ddabce850dcd29b33118c3ca810c97
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and lures users with the promise of game hacks and free in-game currency, specifically mentioning 'Coin Master' and 'Roblox'. The primary link, http://netcdn.tw/app/406889139/coin-master-apk-hack-358-game-hack, is identified as a high-risk redirector. This suggests the document's purpose is to direct users to potentially malicious websites that may host malware or engage in phishing. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a social engineering tactic.

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/406889139/coin-master-apk-hack-358-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-information_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-4l-tiktok_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/where-tiktok-free-view-iphone-11_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-wolf-tail-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-gratui-pour-avoir-toute-les-gamepass-de-roblox-gratuite_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-cosmetic-items-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/easy-hack-to-get-halos-in-royale-high-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-free-robux-message_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
font_00_sfnt_off00002ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA0 22144 bytes
SHA-256: a2ffe2c496c4edff36021fd0b430d67be4af1907924c288c6144a67cc98686b3
font_01_sfnt_off00005dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAD 18696 bytes
SHA-256: 37466016b432fe2c4302c226887fb4a123f095adabdcdeca05fa6b35b2ac340f

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