Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d97c3a4309a94f…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 19:49:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8426085e5a3f987a1c9c1d07e5fd702b SHA-1: d322220956d71767fc20d8b6a92a9a6f413e7099 SHA-256: 20d97c3a4309a94f1c9d1bc953bc4a2c20ab7d7ea553cda45e6763fcfa0756ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that redirect to a known malicious domain, masquerading as a generator for free game currency. The document body and heuristics indicate a lure for 'free Robux' or game hacks, which is a common social engineering tactic. The primary URL, http://netcdn.co/app/431946152/free-robux-gift-card-codes-not-used-october-2021-game-hack, is flagged as a malicious redirector, likely leading to further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-gift-card-codes-not-used-october-2021-game-hack In PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/hack-para-comprar-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-roblox-card-codes-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/roblox-how-to-get-free-pets_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/hack-nuevo-para-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/promocodes-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/roblox-free-shirts-2021_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/how-to-hack-into-an-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-tix-roblox-2021_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/best-free-skin-in-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/roblox-codes-rob-the-bank-hack_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/hack-file-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/cch-ly-robux-free-tren-dien-thoai_GM431946152.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/how-to-get-500-robux-for-free-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
font_00_sfnt_off00003172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3172 22072 bytes
SHA-256: 8fd88fa21a41548abddaa8c57c59caab5f7c5f0f13c498637c986a120b09acf3
font_01_sfnt_off00006260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 19516 bytes
SHA-256: 9f2c7f9eabcb5b2a2483cfd69ecfb34456f984501d1c9ae2c2ef0c71d1197a1c

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