Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c4a98d385c57b9…

MALICIOUS

PDF

46.2 KB Created: 2021-06-04 03:22:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1bea0e983298ab2c0177338d7abd105a SHA-1: 40b8b0fe58bedf499475adb4fc8b51e160d46d8b SHA-256: 04c4a98d385c57b98eb72111639748681701e8b4f233a0e7cb3f9cdfa7bd26ae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically advertising a "game hack" or "free generator" for Coin Master. The ML classifier and specific PDF heuristics strongly indicate malicious intent, likely to drive users to a phishing or malware distribution site. No scripts were extracted, but the document's structure and embedded links are sufficient to infer a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/coin-master-redeem-code-free-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/pokemon-go-free-battle-pass_GM1094591345.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_off0000507b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507B 24740 bytes
SHA-256: 6fc53a168006875df6382d6174109d9a1962f2aa01b098656ffcaf8af460d9bb
font_01_sfnt_off00008890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8890 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9243 18144 bytes
SHA-256: be15255cc2714f9cea0b8925ca130a4bb07aa98d7b6ddfe4ce5f10c01158a085

Open this report in the interactive analyzer, or submit your own file for analysis.