Malicious PDF — malware analysis report

Static analysis result for SHA-256 389bc32dc0717494…

MALICIOUS

PDF

43.5 KB Created: 2021-05-14 04:03:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ffbfed1873b97441efe3bf1727235630 SHA-1: e4ac72500f13dde79cefeed730970f14ff553474 SHA-256: 389bc32dc071749411d3fc950f627341207e9eba61990fb80e4f48fd9bae831e
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to free game currency and hacks, impersonating the Facebook brand to trick users. It contains a critical link to a known malicious redirector, https://netcdn.xyz/app/406889139/coin-master-free-spins-link-2021-download-game-hack, which likely leads to the download of a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/coin-master-free-spins-link-2021-download-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/406889139/coin-master-free-spins-link-2021-download-game-hack In PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/abd-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/coin-master-mod_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_off00004dc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DC7 24760 bytes
SHA-256: 238fc244c813cfaaf3c7772675d292f705c32a81de35f5e748deaa51f8d1ab6e
font_01_sfnt_off0000855e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855E 19036 bytes
SHA-256: e0f8480fa6793c91ec869da5acb64ee4c254eeaf21d467085c584c7dc5eb632a