Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5ade48d5ba8c1a…

MALICIOUS

PDF

46.1 KB Created: 2021-06-04 02:24:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 037dcca9b1b8a6d4799b84719ab19892 SHA-1: a68fd36f42e2cf4c5374cc525dc551ecfb23eebd SHA-256: cf5ade48d5ba8c1ad53e135cb7702941465418f044007a32466d194f8726b2cb
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure for game hacks and free currency, impersonating brands like Facebook and Roblox. It contains an external URI pointing to a redirector, which is a common tactic for credential phishing or malware delivery. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple game-related lures reinforces the phishing or scam intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/www-roblox-com-free-robux-game-hack.
  • 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/www-roblox-com-free-robux-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/pubg-uc-mtc_GM1330123889.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/pokemon-go-free-602_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/tiktok-free-steam-games_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-online-games-like-minecraft_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
stream_004_off0000542b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x542B 26344 bytes
SHA-256: d1d213b6c4f81d756f76ef9a19463a2a92cd40d4f157a0496a2c42d06fa6ca27
font_01_sfnt_off00009084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9084 18708 bytes
SHA-256: 62c028800c68fb05578d3bf96b402573c397accdba69624e3c020ffc1692f811

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