Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7dbc339276b068…

MALICIOUS

PDF

47.0 KB Created: 2021-05-17 01:55:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 625ffddf4014e9fb25c990c25d29cb5a SHA-1: 16f6c8f67e9408c2f6cbadcf83ec1c607a507eb0 SHA-256: 2b7dbc339276b0682adeabc66fad7443957a5d78cfe5ef112ebdc91f4c41ea6d
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 generators". The primary lure URL is https://netcdn.xyz/app/406889139/get-free-food-in-coin-master-game-hack. While no scripts were extracted, the embedded links and the nature of the lure strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/get-free-food-in-coin-master-game-hack In PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/get-robux-today_GM431946152.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_off00004ccd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CCD 30708 bytes
SHA-256: e6a4f40e7c1e2d4ad925eebcc560446e44295ed6d7eb927c05cc9254cf874a4f
font_01_sfnt_off00008b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5E 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00009662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9662 17884 bytes
SHA-256: 9e8203a117569d62088e0d60748e14aeb3e41c3201478a2ae4f054b44a03d8f3

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