Malicious PDF — malware analysis report

Static analysis result for SHA-256 b81f415b088d168c…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 10:24:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 486b2e3317ae9e94c166437a565e88a2 SHA-1: afc234f0b46d4b6cda06865f449b9532539e672c SHA-256: b81f415b088d168c9886224f5e802bc112742815850b9be9eb7e93a09c807256
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and other PDF files, all masquerading as game hacks or free spin generators. The primary lure appears to be 'Hack Master Coin Pc', directing users to a malicious URL. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into downloading further malicious content.

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/406889139/hack-master-coin-pc-game-hack In PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-devil_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-coins_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-blogspot_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_off00004b97.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B97 24968 bytes
SHA-256: c6c96679c6b43597131335ebfd14839dacaf97dffded284be2172f28b05b1572
font_01_sfnt_off000084c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C8 17868 bytes
SHA-256: 22b442a55f4ac2138d92a5558ea0ba8cd172fa39c5ed9e426124379d05989e3d

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