Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ca8b32f729fa10…

MALICIOUS

PDF

45.2 KB Created: 2021-06-10 16:14:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b11d536fd84de3dcb54e6fedf0f7b13b SHA-1: 638af4b2ea5f2aad5d1e1c0b3ca78e74295bb01c SHA-256: 00ca8b32f729fa10e2ba8898202d11f6a19d2398dd0105d27f358db159fd2199
160 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to sites offering free in-game items for popular games like Roblox, suggesting a lure for users to download potentially malicious files. The ML classifier also flagged this PDF with high confidence, reinforcing the suspicious nature of the content. The document body, though partially corrupted, contains references to these lures and a URL that likely leads to a payload.

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.tw/app/431946152/roblox-how-to-hack-someone-game-hack In PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-just-username_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-hack-roblox-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-app_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/pubg-uc-new-freepik_GM1330123889.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.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
stream_004_off00005208.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5208 26888 bytes
SHA-256: 1a4b7ff897d34d7c5a6a30ac9bc19d036b5e9e033a25a577a9f7b5e9edc880af
font_01_sfnt_off00008cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF0 18608 bytes
SHA-256: 7cdbfefd938b86d93e6134bae814fc299d6540b27bdee335e24b18d2e865959f

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