Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13b2109d1472313…

MALICIOUS

PDF

43.6 KB Created: 2021-06-04 04:35:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 52eb585714d1bafa4a1a22c3984a8482 SHA-1: 30cac9b8f1fdbcc47500f9161a9dba57836f80b1 SHA-256: d13b2109d14723139a5d74b8db9d9fe8f19a7d3bb9a187f6991bfadc0854c65c
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 0.9865

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.online/app/479516143/free-minecraft-alts-game-hack PDF link annotation
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/tiktok-free-anime-websites_GM835599320.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://playhack.in/minecraftIn 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_off000050d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D4 25232 bytes
SHA-256: 74e7218fc0023cb9ac585fdf3114c9ae9b9db5d01a36441cc2ea9e1134bb9484
font_01_sfnt_off000089d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D7 17644 bytes
SHA-256: 4350bb70586d7d356c834f80239bf16b03274066df9e9143be1036ee17eff588

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