Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e3eb0cef31e9ad…

MALICIOUS

PDF

35.7 KB Created: 2021-07-01 13:32:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 64ce4545d83cbb21278ed28eb1d914bc SHA-1: e6ef1e387384c095ace09a48b0094bc8c69f29c8 SHA-256: c3e3eb0cef31e9adfc69c4a0d72d93dc090b28600e43c1ad969d1ade29c750b9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/how-to-use-hack-on-roblox-with-admin-game-hack, which is designed to lure users with promises of game hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous embedded URLs further supports a malicious intent to redirect users to potentially harmful content or further stages of an attack. No scripts were extracted, but the document's structure and embedded URLs indicate a social engineering tactic.

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/how-to-use-hack-on-roblox-with-admin-game-hack In PDF document text
    • https://jas8.com.tw/image/data/files/roblox-gamepass-free_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/google-moon-active_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-giveaway-live-stream_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-2021_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/robux-hack-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-make-a-vip-server-free-no-robux-2021_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-account-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_off00003060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3060 23044 bytes
SHA-256: 4dc922989f32d80a208d7566977091616ee663a03c7ed04492e0099f6582c14c
font_01_sfnt_off00006450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6450 19840 bytes
SHA-256: 6243ea17895ec545728ec679b256715f29da6b70a2bde888bb6254f0aa5a508c

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