Malicious PDF — malware analysis report

Static analysis result for SHA-256 6823bbabfc81dce5…

MALICIOUS

PDF

42.7 KB Created: 2021-05-18 00:49:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 904812271c929a5bb3f809d9c910fac1 SHA-1: 57f07c57150b17dd78df97ee2416af6bc71286c9 SHA-256: 6823bbabfc81dce5888d72b0d04e9913cbcc1f7922758b62a2372173768eaf47
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 promises of game hacks and free currency. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further stages of infection or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/robux-hack-no-human-verification-game-hack In PDF document text
    • http://schoolsupportandbeyond.org/images/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/download-coin-master-apk-hacked_GM406889139.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_003_off000049bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BC 24760 bytes
SHA-256: 15da166fec773ce6255416874c39630a1bc61d4e4ca59c35e0a1f50f2f66e8f2
font_01_sfnt_off000082a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A2 18868 bytes
SHA-256: 8c41f3ed2032476b4a245afad5cd23074bff3a00c17c7f8f9be8353034b253b9

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