Malicious PDF — malware analysis report

Static analysis result for SHA-256 148c37ee45ca4197…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 10:54:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 55ecd7296a2a820f3cab28c7ddb6e462 SHA-1: a0b94b0b6a1c1c6e614b09382ac3ebf6af5af33c SHA-256: 148c37ee45ca4197e796fe31a8aadabb1235f895fc7f7954e7d47d1e30ff8107
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' to lure users. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious websites 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/406889139/cm-daily-spins-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/easy-ways-to-get-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_off00005183.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5183 24268 bytes
SHA-256: 8be1abe01f0ccf2253c0aa567126f9e5369fee189235397d1598bc7b0178efad
font_01_sfnt_off00008838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8838 18160 bytes
SHA-256: 3219ea0e52318e94ce20b7b3342b9bbf5f3a389bd6fb88bf591e9537762def99

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