Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc947bc691464b8…

MALICIOUS

PDF

49.1 KB Created: 2021-06-13 15:07:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9f8e3dce54abfcfc025824597fb713c2 SHA-1: 23e0b27da81d8db88171e2ee1608f3d0e93a9436 SHA-256: 1cc947bc691464b8ddfcd84b54c2b7d0e4373f0d0157e40a0917f0e55ae18ae0
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a visual download button lure, suggesting an attempt to trick the user into downloading a payload. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs indicate a social engineering lure related to free in-game items for popular games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/roblox-free-play-no-download-or-sign-up-game-hack.
  • 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.co/app/431946152/roblox-free-play-no-download-or-sign-up-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pokemon-go-free-qwilfish_GM1094591345.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pokemon-go-free-accounts-level-40_GM1094591345.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pokemon-go-free-battle-pass_GM1094591345.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-pins_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_off0000506a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506A 27596 bytes
SHA-256: e18d8645907dc9f440db434bd40c662921d3412bc8e287b8c9695c1d65b1ad52
font_01_sfnt_off00008ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED2 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9884 19784 bytes
SHA-256: c24ef4355efa3a07cb342f6c411151c4a30a89796997034c1e0a30726b308a26

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