Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b398dba24634df…

MALICIOUS

PDF

33.6 KB Created: 2021-06-21 19:12:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a4a30d7f540f2ed740fa3a7137530372 SHA-1: aa9f21514735ada1b2f4e2761cecdb286c2d7875 SHA-256: 87b398dba24634df2505d0404ed738399fd71c6b9ee19e9a2f3cc6964b233c1a
160 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks, specifically mentioning 'Hack The Game Coin Master', and embeds a link that redirects to malicious infrastructure. This indicates a social engineering tactic to trick users into visiting a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/406889139/hack-the-game-coin-master-game-hack In PDF document text
    • https://limebug.com/media/storage/editor/files/play-jailbreak-for-free-without-installing-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-roblox-hackcom_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-how-to-get-free-gamepasses-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/simplysarc_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-live-stream-roblox-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/como-hackear-roblox-para-tener-robux-2021-pc_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-roblox-with-an-injector_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
font_00_sfnt_off00002f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5C 22044 bytes
SHA-256: 9d16ad96f4bb31b7d0b0863b1dc2ceef3cc07a6aedc8ee145e72174a3fe3b67b
font_01_sfnt_off00006025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6025 18428 bytes
SHA-256: 51a0c449eaa86980a1dd870200fb645f17238fc71baeb716fc22b8a77d6de95e

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