Malicious PDF — malware analysis report

Static analysis result for SHA-256 88399b684af11169…

MALICIOUS

PDF

34.8 KB Created: 2021-06-18 19:35:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 11e3adc84e01497142555bdee49c241c SHA-1: 8811a8bda9ff1ca51c682180102fc96127e6b199 SHA-256: 88399b684af11169a03abbb0fc069aa4711edca7c489ea14414a20611d0e4255
160 Risk Score

Malware Insights

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

This PDF file contains multiple links to known malicious redirectors, disguised as offers for game hacks and free currency. The primary lure is 'Cute Roblox Outfits For Free', directing users to 'http://netcdn.co/app/431946152/cute-roblox-outfits-for-free-game-hack'. The document's structure and embedded URLs suggest an attempt to trick users into downloading further malicious content or visiting compromised sites, likely as part of a phishing or malware distribution campaign.

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.co/app/431946152/cute-roblox-outfits-for-free-game-hack In PDF document text
    • http://global-brand.net/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-spin-link_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-hack-robux-on-ios_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-generator-2021-vrai_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/are-any-boys-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-ios-12_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
font_00_sfnt_off00003256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3256 22108 bytes
SHA-256: e9424198b37e8f757b49fbdf0e719b644ef73533206c386287e10e15022f879a
font_01_sfnt_off00006338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6338 19012 bytes
SHA-256: 23a96c00bf9e3d7cceeb0f53adb636d5212c27549f52c5ac7755d22fbcb40405

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