Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ef436fc84c7d61…

MALICIOUS

PDF

34.0 KB Created: 2021-07-07 02:28:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 217b916fd62fb56c1dc8ee558272eb3f SHA-1: 66dbe7b47e79d0473f8ffee6130450f03cb9aa73 SHA-256: 45ef436fc84c7d61c706121406127306d1edc7ef28f20bbd628de04ce8e855cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a lure related to game hacks and free accounts, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The primary URL, http://netcdn.tw/app/479516143/free-minecraft-java-account-game-hack, is likely the initial landing page for the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-minecraft-java-account-game-hack PDF link annotation
    • https://www.jjpremiers.com/files/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/flob-fun-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-how-to-play-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-robux-d_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/worst-client_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coolkid-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-jailbreak-hacks-for-mac-2021_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-hack-codes_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_off0000318b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318B 21904 bytes
SHA-256: fa436f36346783b5e1e6f67f615cdc499f3bc1ada2ae6c1ef5055f5689bbb916
font_01_sfnt_off000061c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C2 18420 bytes
SHA-256: 1c3f9368ae9341fd87c323918a5db0c95def7528b1578e993c766083598f8ad6

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