Malicious PDF — malware analysis report

Static analysis result for SHA-256 1247d1de11deb34f…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 06:28:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b6e3786ab54b20f22d891069834c882d SHA-1: bc091bfaaeb0bf4d9edcfbf285dbd764d6f827e1 SHA-256: 1247d1de11deb34fe9eb3f06e51946bd6e25ee472d7227ef77ee8e3633df64f5
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document uses a lure related to 'Free Robux' and game hacks, directing users to an external URL. This is a common social engineering tactic to trick users into visiting malicious sites or downloading further payloads. The presence of embedded URLs and the 'GAME_HACK_REDIRECT_LURE' heuristic strongly suggest this is a phishing or malware distribution attempt.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-by-watching-ads-game-hack PDF link annotation
    • https://library.um-sorong.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/pubg-uc-buy-online-pakistan_GM1330123889.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/promo-code-free-robux_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_off000051eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EB 25892 bytes
SHA-256: 46308d5edc60de6e6ba38f3b35fa1a0737dd5d15d797e72adc31f0206c0a4767
font_01_sfnt_off00008dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEE 19472 bytes
SHA-256: 06b7c2c04a08988b26013261e09f65c94c24f523f4ae9df4e6f4943f7c42b6f1

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