Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77f7133715f2960…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 13:20:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 991155efa49a3986610ef95af6e95eb3 SHA-1: 105cce8914abaa5961106e5aec12765a7ede7f33 SHA-256: e77f7133715f29602d2d84cad3fb05dafdd68b0015f6b805f94a9d65c657578f
160 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a "roblox-builders-club-free-game-hack" which, combined with the ML classifier's high confidence, indicates a malicious intent to trick users into downloading potentially harmful content. The document body, though heavily obfuscated, contains references to the same lure and URL, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/roblox-builders-club-free-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pokemon-go-free-ditto_GM1094591345.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000526f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x526F 25456 bytes
SHA-256: f733c9b1980ee45a2220646efe30597d33fd462ea7dfec540e7de7226c284fb1
font_01_sfnt_off00008d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D62 18384 bytes
SHA-256: ca5233fc9ce80ece0aee0c96fa35d529a08b6cb3fb28871df95ba3e8db8004f0

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