Malicious PDF — malware analysis report

Static analysis result for SHA-256 c689d5ea8b1973b4…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 13:40:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 91aba2c3e09839a7da17c849179d0623 SHA-1: 78ef2d3c44a0c0896df885f1510c6f3a0f8fc55e SHA-256: c689d5ea8b1973b4d0f5b998d5c90dd9fe5185d27d5e18abe7f5e55ea212eb73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs related to game hacks and free in-game currency, specifically mentioning Roblox. The presence of a high-confidence ML classifier firing and external URI heuristic strongly suggests malicious intent. The document body, though partially garbled, reinforces the theme of game exploits and includes a primary malicious URL.

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/what-do-roblox-points-do-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-2021-september_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/como-hackear-roblox-con-cheat-engine-68_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-dll-hacks_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-jailbreak-how-to-get-money-free-and-fast_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/case-clicker-case-hack-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheat-engine-bypass-for-roblox_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/free-robux-codes-2021-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/claim-robux-free_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_off00002fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEE 22880 bytes
SHA-256: f190583a7bfd137aa78ce02a042c5c3fad0bdc77774dfe07d1448121f1a01aec
font_01_sfnt_off00006325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 19396 bytes
SHA-256: 973ccab729b01203ee59feaca07c871b44131ad73a0d20edb39373357cce7c1b

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