Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2bde095af4ad27…

MALICIOUS

PDF

46.6 KB Created: 2021-06-09 12:14:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e19eeee6fb9e33ef9638a2500fcdc035 SHA-1: 40c366dbfc2b0d4ad6441cbcfe4319dd1445c52f SHA-256: df2bde095af4ad27f55738d70e6a8f0d7a1e48698df37943c8f6b94c1038570d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with 'game hack' and 'free generator' themes, indicating a phishing or scam attempt. The embedded URLs, such as https://netcdn.tw/app/431946152/caillou-hacks-roblox-game-hack, are designed to lead users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious intent to redirect users to malicious sites.

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.tw/app/431946152/caillou-hacks-roblox-game-hack In PDF document text
    • http://perpus.masda.ac.id//repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-mod-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-hack-no-human-verification-pc_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_off00004ff5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF5 25164 bytes
SHA-256: 7ecd669692453b51dd77c98b854be5286f56e7f9411f0c4c06d4b7db790c4c85
font_01_sfnt_off00008931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8931 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000092e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E0 18444 bytes
SHA-256: ae5b827185d2889c8cf5d739f06cfc1e594d6d4fcd86d79c43614432dc87a525

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