Malicious PDF — malware analysis report

Static analysis result for SHA-256 2864c317fb2cf1e8…

MALICIOUS

PDF

35.0 KB Created: 2021-06-21 11:58:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2a184120211e4d595ad4f87d95cf9dde SHA-1: f6745865e483ce930c0c67e20e77715d742f6868 SHA-256: 2864c317fb2cf1e84b26242d61d248166eac2cb78a90da80cd7b52e8d06a1407
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure at http://netcdn.co/app/406889139/coin-master-ad-game-hack. This lure is presented as a 'free generator / game hack', indicating a social engineering tactic to entice users into clicking potentially harmful links. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/coin-master-ad-game-hack In PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-login-page-free_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/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hack-the-game-coin-master_GM406889139.pdfIn 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/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/mcpe_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/tiktok-free-wallpapers_GM835599320.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_off00003201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3201 23344 bytes
SHA-256: 234144d53184e3a47095ef2774cc923e8ce89ef669edebb8a1321d4432204422
font_01_sfnt_off000066fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 18008 bytes
SHA-256: 93b7dc2fd31d097fadffeac7d444a32e6f7bb9136229f390d1dbe79aaa2db717

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