Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43e656e6b403f51…

MALICIOUS

PDF

45.2 KB Created: 2021-05-18 05:19:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c0fbd733662d14c31ebb6241522a0b32 SHA-1: f83eda32473e581f76f005752e4f195ca1fb8827 SHA-256: e43e656e6b403f515b6df5f240eb58334d873fc87d100da93d10832f119037ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "Coin Master 70 Spin Link 2021" and includes a link to a known malicious redirector. This redirector likely serves as a gateway to further malicious content or downloads. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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-70-spin-link-2021-game-hack In PDF document text
    • https://www.stayon.no/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.stayon.no/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/free-robux-survey_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_off00004874.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4874 26160 bytes
SHA-256: be85db2e4356f34b3bada4399bf5aafe419cfe8dd6b247151a8b70864e0ee8a4
font_01_sfnt_off000083d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBE 18348 bytes
SHA-256: 3aa27ca2b5074155a6d55c4a086f76437c73bbd8756faa1ee68498049c11f83f

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