Malicious PDF — malware analysis report

Static analysis result for SHA-256 8666098bbde91ba4…

MALICIOUS

PDF

44.7 KB Created: 2021-06-11 08:12:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 02f7f4f5317dabe3ccf853bded8d0588 SHA-1: 9e6e33b9c703c089efd1d48b6baea4cd39ef2833 SHA-256: 8666098bbde91ba4f2adeb8b2be3eac6a840111b6efb90e697ee8233823561ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users with promises of free game items or hacks. The document body, though partially corrupted, contains text related to 'free Robux' and a URL pointing to a 'game hack'. The presence of embedded URLs and the critical heuristic firings strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/4-step-way-to-get-free-robux-2021-november-game-hack In PDF document text
    • http://io24.com.ar/images/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/como-ser-hacker-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-login-free-no-download_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/logos-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/tiktok-free-ads_GM835599320.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-operation-scorpion-hack_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-rbxboost_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-paintball-hack_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-roblox-with-cheat-engine-65_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/tiktok-free-download-2021_GM835599320.pdfIn PDF document text
    • http://io24.com.ar/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-roblox-games-unblocked_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DBE 25644 bytes
SHA-256: 35462ad38c23b605ea2e8194e19551e8363ccc624b13c7c719cf25c2da6d8472
font_01_sfnt_off0000877f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877F 19740 bytes
SHA-256: c808fcba3d1b2790e7cabe0d12a7b26fe5fe69a294fb8ec6344328ce788f6e4b

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