Malicious PDF — malware analysis report

Static analysis result for SHA-256 a933a9275c6c10e8…

MALICIOUS

PDF

45.1 KB Created: 2021-06-08 23:30:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8cd873f8bd87085f3a5dbb6de1e9c83 SHA-1: b9e37fa6acb869c2fc7ef7e2f814e67d2c5b8c9f SHA-256: a933a9275c6c10e8034d3cbd65e4eca9d4cb82764b9fc1c4ad6945b5d8d5fa0e
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, disguised with lures related to game hacks and free items. The primary link, https://netcdn.tw/app/431946152/roblox-how-to-get-free-clothes-2021-game-hack, is identified as a redirector to potentially malicious content. The document's structure and embedded links suggest an attempt to trick users into visiting compromised websites, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/roblox-how-to-get-free-clothes-2021-game-hack In PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-robux-aout-2021_GM431946152.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/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/tiktok-free-gas_GM835599320.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/tiktok-free-online-textbooks_GM835599320.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-hack-app-2021_GM406889139.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_004_off00005110.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5110 25780 bytes
SHA-256: 3ee398478261409744cb3afda2fc61fa0f3d96bc7b3c75a3ed080d8c3365ff4d
font_01_sfnt_off00008c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C29 18784 bytes
SHA-256: b724e7fceb4cf2a5909ad66e3ae3fb5cfb1506f9dcfb309604abd0fdb1e7dc55

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