Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdeea74fa38071a…

MALICIOUS

PDF

44.7 KB Created: 2021-06-04 03:25:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bc0302581033dbdc701ad216aeef1cde SHA-1: 1fe19aa10569a843c4eb51c12ca1cf8be2274af8 SHA-256: 9cdeea74fa38071a603b425fa162d9b28d8aca145b28b00670ca75cb380c8c51
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a URL that is also flagged as malicious infrastructure. The document body, though heavily obfuscated, contains references to the same URL and appears to be generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The primary goal is to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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.online/app/431946152/google-how-do-you-get-free-robux-game-hack In PDF document text
    • http://library.persadabunda.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/wahoogaming-co-free-robux_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
stream_004_off0000503e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x503E 25024 bytes
SHA-256: 47ff38a44d1d63ba25c5602ccfa92549bb28ca8c9519e849e50ee954bc3b4fe5
font_01_sfnt_off00008a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A25 18972 bytes
SHA-256: 7e42234451cc840f7005e057c881a5adaeb6eb05dfbb8a23217c49a1ae6b06df

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