Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b207b768bc72ca…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 22:26:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7ba719c5002bbef659e80d6b383049cd SHA-1: 560002649b7ab7fe409700900f87ed507dc4b5fc SHA-256: a5b207b768bc72ca96da687812966890795cd5b0d9f4de7f937be1530a5270a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free in-game currency ('Roebucks' for Roblox, 'spins' for Coin Master) and includes an external URI pointing to a suspicious domain. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of the external URI and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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.tw/app/431946152/how-to-get-free-roebucks-on-roblox-game-hack In PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-robux-hack-script_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/hacks-master-coin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/is-overdrive-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/download-minecraft-free-hiapphere_GM479516143.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_off0000304a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304A 21564 bytes
SHA-256: e821bbacac43142bb379272d87fc6a4c13c5b50b159d8fda828fa7276f37d430
font_01_sfnt_off00005f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7B 19228 bytes
SHA-256: e0defeb3cdfa0b2bd15f1d655f37073a2afc05a1f059c7295c9a06f93db64536

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