Malicious PDF — malware analysis report

Static analysis result for SHA-256 49dc134f7a806fd7…

MALICIOUS

PDF

42.7 KB Created: 2021-06-04 04:25:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: afd6bcaf3323e77c288983507f48a027 SHA-1: 844ad7358e49cec86ef55cc360c9e18e3ff56a4d SHA-256: 49dc134f7a806fd77d65a76f4e9aaa3106a83533c14f1b1896109b052360f7e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URI pointing to a "coin-master-hack-no-verify-game-hack" URL, strongly suggesting a lure for users to download a malicious payload. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate a likely attempt to deliver a second-stage exploit or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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-hack-no-verify-game-hack In PDF document text
    • http://library.acehresearch.org/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-card-1m-codes_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/who-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_off00004ed4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED4 23732 bytes
SHA-256: 335a2427b92732cb0f9dd4e49c1ca0ff204fef5682e9246c1a10c180c205fe22
font_01_sfnt_off000084c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C4 18032 bytes
SHA-256: 54638c529080804e5acac8de7a55685f76245eef83df4e09abff776108167d18

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