Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fdca6f0f7634fe9…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 20:27:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 44b7176150f165a0e4c50cf56730f8bf SHA-1: 04fb843d424d19df4dbb6cc2acc376b0238f2322 SHA-256: 8fdca6f0f7634fe9bc87a1237800815d531996553112f4fb2cb775182fa3a20a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to free game hacks and generators, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which likely leads to a further malicious download or phishing page. No scripts were extracted from this sample.

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/can-you-play-minecraft-for-free-game-hack PDF link annotation
    • https://morishita-tc.com.tw/image/data/files/free-roblox-exploits-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-basewar-cheats_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/help-robloxcom-free-robux-bc-generators_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/cheats-to-steal-a-keycard-in-roblox-rocketfule-jailbreak_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-admin-group-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-app-download-robux-genurater_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/booga-booga-roblox-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robloxhacks_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-robux-hack-generator_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_off00002f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F00 22316 bytes
SHA-256: ea9f81b9f4c95cf4638086aac381327832a57552d1aff772e3548dd4b06849c1
font_01_sfnt_off00005ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFB 18708 bytes
SHA-256: f5208eddf1f6b5c18def2bcdaa7b9b4b699475180da5a60222e46653029b9c71

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