Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b45a73587e0d711…

MALICIOUS

PDF

45.0 KB Created: 2021-05-12 23:09:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9544ea2d33799172af70e18b59622fb3 SHA-1: 8d94856bcbfaffc4c0420820600ca11786db5dff SHA-256: 8b45a73587e0d7115f270372ed12ef8454ef47aab779a973323ea2fede62e0f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The presence of embedded URLs and a critical heuristic firing for malicious redirector links strongly suggests a phishing or scam attempt. Although no scripts were extracted, the document's structure and embedded links are designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-to-get-free-spins-grom-coin-master-game-hack In PDF document text
    • http://www.businessgalaxy.lk/files/files/coinmaster_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/robux-2021_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000509b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509B 26624 bytes
SHA-256: 5d9b5de184c4cd6be0ae80f69a3ca7baf86d4188b9e3a73c774e89843487c3da
font_01_sfnt_off00008df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF6 18308 bytes
SHA-256: 54bc4cb339ab54a414e81dbc8c78cd983f23e840174d14985084a71892f993b4

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