Malicious PDF — malware analysis report

Static analysis result for SHA-256 15de77c288d16501…

MALICIOUS

PDF

48.5 KB Created: 2021-06-11 06:54:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 799209be153a40d46cf30ca435a3fe65 SHA-1: 8d71a5d936c3c2990609d6056d69c2509099af6d SHA-256: 15de77c288d16501e3b67a3c3aea0f20833b7765b6f367e405edf4d2d916d3a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual call-to-action, strongly suggesting a phishing or social engineering attempt. The ML classifier also flagged this PDF as malicious with high confidence. The primary URL points to a lure for hacking Roblox accounts, likely leading to a download of a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/roblox-how-to-hack-a-password-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-no-waiting-proof_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-accounts-v3rmillion_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-weight-lifting-simulator-hack-to-get-super-strong_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-cattlog-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-coins-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/competition-for-free-robux-no-lie-still-on_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/mega-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/tiktok-free-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-2021-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-no-human-verification-site-wwwjeuxvideocom_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://discordIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C5 25004 bytes
SHA-256: a5e0127d540c9479612ab35849658f9e7c66b99f499f7351cb187fb9fba5309c
font_01_sfnt_off00008cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF3 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000999b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x999B 18672 bytes
SHA-256: bbe717efd11191aea82d81c8ffd32dfbe92bda246f26c413e392524c49498d73

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