Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb47a59bd2baafb…

MALICIOUS

PDF

48.5 KB Created: 2021-06-09 08:10:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 300dcacac33ca1b2abc343965940d9d9 SHA-1: 1d52437c960e6df624d7d36aeb524dbe54c740cb SHA-256: 3eb47a59bd2baafb4d93415e510d39d2c0d2dcc043eed09318b572b8d9e4c723
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to game hacks and generators, embedding multiple links to known malicious redirector infrastructure. The primary link directs to 'netcdn.tw', which is flagged as malicious. The document body, though partially garbled, contains references to 'Roblox' and 'game hack', reinforcing the lure. No scripts were extracted, but the embedded links suggest a workflow designed to lead the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/how-to-become-hypebeast-in-roblox-for-free-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-tampermonkey-hack_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-link-download-for-iphone_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
stream_004_off00005517.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5517 30764 bytes
SHA-256: 57e6b3cf4cd3cdc059d6ec57bd93ca9850d2b2888f50d347964af2b438cd1c63
font_01_sfnt_off0000991b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x991B 19060 bytes
SHA-256: edcb8b055dbf52fb788d004769d22597c54045d30725ef7487ae99c50318e455

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