Malicious PDF — malware analysis report

Static analysis result for SHA-256 612cdd9af7f178b0…

MALICIOUS

PDF

44.9 KB Created: 2021-05-16 16:40:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf741a929a8f3a79823043251d628547 SHA-1: 500e6695d0b1f6799586de26f5c7ba5afc8d0497 SHA-256: 612cdd9af7f178b0eb3074a9e2c3f3ca60b84427549e63c192bd04365b2c250e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to known malicious redirector infrastructure, specifically advertising 'Coin Master Hack App' and 'free generator' lures. The primary link directs to 'https://netcdn.xyz/app/406889139/coin-master-hack-app-game-hack', which is flagged as malicious. The document body, though heavily obfuscated, contains references to this URL and appears to be designed to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-hack-app-game-hack In PDF document text
    • http://berntfoto.dk/images/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://berntfoto.dk/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/static-moonactive-net-rewards_GM406889139.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_off0000497b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497B 25560 bytes
SHA-256: c4968a72dc3ab09d820c91954fdaa835bdce5711b7bf697c253f802dab53137a
font_01_sfnt_off000083f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F9 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE3 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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