Malicious PDF — malware analysis report

Static analysis result for SHA-256 f981abbba178c72e…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 17:02:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 24a3aba63995fd144b68013e676b0872 SHA-1: b8bde2877ccd715c218639b37dd476c07d6316ec SHA-256: f981abbba178c72e3460d4a28061e9bea33c72b57db54a98fc6ff915a7c52b2a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The primary link, http://netcdn.tw/app/479516143/can-you-get-minecraft-for-free-game-hack, is designed to trick users into downloading potentially malicious content or visiting further compromised sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/can-you-get-minecraft-for-free-game-hack In PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/roblox-rocitizens-hack_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-robux-com-hack_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/roblox-jailbreak-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-hero-roblox_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/how-to-get-free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/daily-spin_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/robux-gainer-free_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/roblox-headset-free_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/no-survey-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/rbxoffer-com-free-robux_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
font_00_sfnt_off00003234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3234 22416 bytes
SHA-256: 727ba7bcbbfeb5eda1bffd8404070d8ee104ee31d2c53c4b06e37c60efdf8a07
font_01_sfnt_off0000641c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 18300 bytes
SHA-256: c08e82774fe0a81da19594a5cf3907660e0230fba24b2cf17cc79424c62cfd00

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