Malicious PDF — malware analysis report

Static analysis result for SHA-256 621c64ba6acef23c…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 08:38:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ed92e92c8e03cc21a8eb2d3cf02413d4 SHA-1: aee7e8c3642b77cf1794dd82f1897c3aacd3679d SHA-256: 621c64ba6acef23ca5a903d1d8f5d0473f9a7b991f4c84b82792c18b4221e8dd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple embedded links, including one that directly points to a 'coin-master-free-spin-software-game-hack' URL. This, combined with the 'PDF_GAME_HACK_REDIRECT_LURE' heuristic, indicates a social engineering tactic to trick users into visiting a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious.

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/406889139/coin-master-free-spin-software-game-hack PDF link annotation
    • http://perpustakaan.bundadelimalampung.ac.id/repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51CB 25684 bytes
SHA-256: 6b59f0afff508e9cc152ea5a4a2ebcc045654adb4bb3cee9f20d2e7081e77b2f
font_01_sfnt_off00008bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFA 18052 bytes
SHA-256: fae64eb33564783cbf84277a7ff47d82a2ae5ec1c1dc0520c64e362eeabcf4e5

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