Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16c11e89f132f85…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 11:05:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 70f62161b7c573d4847578da5326c6b8 SHA-1: 3d74c46e1c3bb96d0a7699b2102bbfb95d27dd8e SHA-256: f16c11e89f132f850b05f0c70366e77ee41b9f565aad484857abf11e02ef863f
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a malicious redirector. The document body and heuristics indicate a lure for game hacks, specifically mentioning Minecraft and Roblox, aiming to trick users into clicking the malicious link. This suggests a phishing attempt to deliver a payload.

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/minecraft-java-edition-download-free-game-hack In PDF document text
    • http://library.acehresearch.org/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-breaking-point-hacks_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/cheat-engine-roblox-jailbreak-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/cheat-engine-64-roblox-noclip_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-seaside-cheat_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/reversal-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-login-free_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_off00002ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC7 22460 bytes
SHA-256: 404292ef018b25cf773cddeee0dfe04a6a2a0c8fa607ede674276517e4de62ba
font_01_sfnt_off000060bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BF 18856 bytes
SHA-256: 5b5dffd1801a7646d4903e54774a45840ad7d6456fb30c9e0aec91f174fc5586

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