Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9335283855bc857…

MALICIOUS

PDF

43.7 KB Created: 2021-05-14 09:12:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 10682141130ff20cae93d43205f99e44 SHA-1: 2837c846465cd6465a92df20a7d4ee081877787d SHA-256: d9335283855bc8579e4c0af1e6f7e02dfbcaf09d408f8fdd23617501bd750a5f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting game hacks and generators. The heuristic firings confirm these links lead to known malicious redirectors and exploit a lure for free game items. The document body, though partially corrupted, contains references to these lures and the malicious URLs, indicating an attempt to trick users into visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/roblox-person-game-hack In PDF document text
    • http://regnataudio.com/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://regnataudio.com/images/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://regnataudio.com/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-money-hack_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_off00004c3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3E 27028 bytes
SHA-256: 0e5cc2c9d47c4d841f30e5c2e39f0f762100367f76b349d932295ce131dfe950
font_01_sfnt_off000089c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C8 17936 bytes
SHA-256: f4f04d29b57f2a72625fc9e352393071ee42f2c511d00c6ae5a127c0a3ffd084

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