Malicious PDF — malware analysis report

Static analysis result for SHA-256 9957c61d4adbe842…

MALICIOUS

PDF

46.5 KB Created: 2021-05-13 21:07:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 69ef8c87d5a7975520cf92bd54d91e93 SHA-1: b58bec8ffab32bc7e0fe27bdc3d5566f928cd3ac SHA-256: 9957c61d4adbe842215fc403968ac5fc9e1e89428beae1ef5dbd5836c1070020
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 game hacks and free currency for 'Coin Master'. The heuristic firings confirm these links lead to known malicious redirectors and a lure for game hacks. The document body, though partially corrupted, contains the primary malicious URL, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-mod-apk-latest-hack-with-unlimited-free-spins-game-hack In PDF document text
    • http://www.fluidtech.hu/images/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/2021-roblox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coins-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/get-robux-com_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004db3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DB3 25072 bytes
SHA-256: 3a8935b9e0cddda03a8aeb78191bfbcbe806364677aa9a978dbaecdb30a26b74
font_01_sfnt_off0000872b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872B 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000090dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90DC 19116 bytes
SHA-256: ec39511f044db0039b033061d0c06de0ea4b06e85abf4e03074bae323e4248a1

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