Malicious PDF — malware analysis report

Static analysis result for SHA-256 55219a54bd3fa01f…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 23:59:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2076663c453daf5d8aec740f197892e2 SHA-1: 24c005e0429df54ea6e0e2ad1b4610d57e2adb12 SHA-256: 55219a54bd3fa01f1c8ec5e5980ee0e4510824a75c0ab9f9df1d8a1d5f72e856
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as generators for popular games like Coin Master and Roblox. The primary lure is a link to 'free pet food on Coin Master game hack', which redirects to netcdn.xyz. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

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/free-pet-food-on-coin-master-game-hack In PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/optifine-mcpe_GM479516143.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A74 24648 bytes
SHA-256: b0cb50eed14e447e05c8a2016dda9f8275250f42c1b73a77a57042990d6d526a
font_01_sfnt_off0000833c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x833C 18040 bytes
SHA-256: 72696d2ffdfae0c11be198a3906a4703c512c64a5394f2f3ef3af6073f4420a0

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