Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ab1bcfa5745265…

MALICIOUS

PDF

54.9 KB Created: 2021-06-10 15:04:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4bf5b64accfe5bae7f885070d70b49f0 SHA-1: 55a3f0168c876e67af724d3b918199cfe72fcf04 SHA-256: e8ab1bcfa574526505e3c4b74eae02e0b68f4c0f6b40360f560948c23efff094
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a redirector lure, specifically linking to a 'free generator / game hack' page. The document body and extracted URLs reinforce this, pointing to various game-related cheats and hacks. While no scripts were explicitly extracted, the nature of the lure suggests it is intended to lead the user to download or execute further malicious content, likely via a web-based exploit or downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9649

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/hacker-roblox-games-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-toy-codes-free-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/get-free-robux-today_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_off00005420.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5420 29736 bytes
SHA-256: 31b28234f64f76c513d019894d9742fb7ff9e2f6388e442ba66507dd39cf6e7f
font_01_sfnt_off00009753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9753 8704 bytes
SHA-256: ddfd86c88a6b8304bc31eeb9f28c8110fac325cdacc87503bacf4ac741777490
font_02_sfnt_off0000b3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BE 18440 bytes
SHA-256: 540de7c3ae8472ae8c809c5fc57427fb54472a2c4efec33796ccf22267a2de1a

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