Malicious PDF — malware analysis report

Static analysis result for SHA-256 be770310ad8a35bb…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 23:27:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b1bb9b3c76b6307234f88cddf13b3e80 SHA-1: 8f546df7bb684054f975af3efa0036d4cb454dfa SHA-256: be770310ad8a35bb5ba41281801271036ec7cf0f91495128f5d2e4bc304db352
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an external URI and embedded URLs that lead to sites offering game-related hacks and rewards, suggesting a social engineering lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a malicious workflow. The document body, though partially corrupted, contains references to game rewards and a URL that likely serves as a download link for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/406889139/coin-master-daily-free-rewards-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-cheat-codes_GM431946152.pdfIn 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_off0000514e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514E 24056 bytes
SHA-256: 71d610c5d4aa440919bb8ebd72af517b35cf15450a3a978a5d9874c5d3620341
font_01_sfnt_off00008833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8833 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000091e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E6 18468 bytes
SHA-256: d7aeb26289e2269d4bb478c8c95e02d02e09ec61abdc4523be76647d936bf4f1

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