Malicious PDF — malware analysis report

Static analysis result for SHA-256 427291461827606a…

MALICIOUS

PDF

42.8 KB Created: 2021-05-11 17:30:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b16e2933f871e37b84178ff1118aa22c SHA-1: 06c28627435d4794fa1d0fbd0d7de4bedf3e01b1 SHA-256: 427291461827606a00d3b487fd461508707e70fc5bc4f068b78eb8844fc487a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'Coin Master Hacks' and similar lures. The document body and extracted URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful websites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-hacks-no-verification-game-hack In PDF document text
    • http://ilijakom.com/images/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://ilijakom.com/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/free-robux_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/open-coin-master_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-hack-mod-apk-android-1_GM406889139.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_003_off00004d91.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D91 24752 bytes
SHA-256: 10192a2b03512bafffa8b1170eeb03705cbe6514e88611eefd04b0e6b21f97d6
font_01_sfnt_off0000864e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864E 17848 bytes
SHA-256: 31edcb062e0c4d358e7699eb17481b8bb2542c8a2ca42b35e989066c8723d51f

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