Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4dffec9f68af9b…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 15:32:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e040cf5fd5ce3a22e4aab903825f0fd2 SHA-1: cef79c0f005f912fb66020e3cfcf73c7618d8353 SHA-256: 8f4dffec9f68af9bd53b0b6e223633e990eec65af571cdc2c4eeb100131db062
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document contains multiple links designed to lure users into clicking on them by offering game hacks or free currency for popular games like Roblox and Coin Master. The primary malicious link redirects to known malicious infrastructure, and the document impersonates brands like Facebook to increase its deceptive appeal. No scripts were extracted, but the embedded links and the nature of the lures strongly suggest a credential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/roblox-c9m-game-hack.
  • 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/431946152/roblox-c9m-game-hack In PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/can-i-get-free-robux_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_003_off00004996.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4996 26228 bytes
SHA-256: ef7bbdf0c33c666c1ccd3b66e9807e8d53205753fcc06452196431c05fc69c98
font_01_sfnt_off00008586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8586 18208 bytes
SHA-256: d0830a4487a58efcb4b6460ab92d3ab79d455f6d9aefc11f2cbbaed4a9a3cb71

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