Malicious PDF — malware analysis report

Static analysis result for SHA-256 8768066bbe10a01a…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 12:13:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c8398d4c71c6bb627d84c324200fe057 SHA-1: 79084a3d70d7214c3d640ab5e9910888a5311a8e SHA-256: 8768066bbe10a01a8fce32f8096a8899392a2817357cdd617bc75c248236b587
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'generators'. The primary lure URL is https://netcdn.online/app/406889139/coin-master-hack-without-verification-code-game-hack, which is designed to trick users into clicking through to potentially harmful content. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-hack-without-verification-code-game-hack In PDF document text
    • http://handimanlibrary.org/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/pubg-mobile-74-uc_GM1330123889.pdfIn PDF document text
    • http://handimanlibrary.org/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/tiktok-free-8-ball-pool_GM835599320.pdfIn PDF document text
    • http://handimanlibrary.org/repository/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://handimanlibrary.org/repository/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-that-actually-works-2021_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_off000050a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A5 26152 bytes
SHA-256: c16d4083c64f338e33c036961ea4ae97a79679f1db2ec9bd0762f66244e73297
font_01_sfnt_off00008bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB8 18528 bytes
SHA-256: 73698aa0d04f612b8edcfc98417ef0f8be184b3e572c91f5f0109cbf791ef469

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