Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cfa510cb9c7aa5…

MALICIOUS

PDF

43.8 KB Created: 2021-05-16 11:59:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dabc7d571399330128383a6b70fb7ee6 SHA-1: a680a4c16bec83c8e292872efe4aca2c366f698e SHA-256: 68cfa510cb9c7aa53748934117314bae2ba7ca2b8f988e358dd2de4b76facbcb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising "game hacks" and "free coins" for popular mobile games. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a phishing or scam attempt to redirect users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/coin-master-free-coins-app-game-hack In PDF document text
    • http://sid3r.com/images/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sid3r.com/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sid3r.com/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://sid3r.com/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://sid3r.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://sid3r.com/images/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://sid3r.com/images/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://sid3r.com/images/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://sid3r.com/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://sid3r.com/images/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://sid3r.com/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://sid3r.com/images/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://sid3r.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sid3r.com/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://sid3r.com/images/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sid3r.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sid3r.com/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://sid3r.com/images/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://sid3r.com/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://sid3r.com/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.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_003_off00004703.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4703 24696 bytes
SHA-256: 69a903e49de24aca7e9d1a2f140eaadaecc8cfff6a13d7f2e8f12a3b07ae4278
font_01_sfnt_off00007fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE8 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000089d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D2 17884 bytes
SHA-256: 3acccbbe7a83c149c22979297be8e0f2d1fa2551ed3d228e44848c7e1eaf2a55

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