Malicious PDF — malware analysis report

Static analysis result for SHA-256 720efc8bc128c4b5…

MALICIOUS

PDF

44.2 KB Created: 2021-06-10 14:58:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf4fc55a6077c8075c7984d07227b349 SHA-1: 145cad9670ea302bb04f41c8eff6730a2515f890 SHA-256: 720efc8bc128c4b53f556da32f72f84b71974a1288b60b754d2cdd3970abd69c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.tw/app/431946152/roblox-cookie-hack-game-hack PDF link annotation
    • http://grugliascogiovani.org/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-tiktok-followers-no-human-verification-2021_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/10-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/hack-jailbreak-roblox-teletransporte_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/robux-hack-download-pc_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_off00004eb9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EB9 26100 bytes
SHA-256: 802f9af4510f9b687ce949854f5a905fe10f2d3cb8f6f0c06e913fcb961b4c76
font_01_sfnt_off00008a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A17 18300 bytes
SHA-256: 3dd02c6c3c72e14567dc33efd8e8c77f33fa155e2cc659b84174eafc2577f39a

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