Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad51252baa60398c…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 09:17:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2e3e86e61acba35824f39aa1bcb2f586 SHA-1: 2c200e786dc4b4f6fae43dcc48170180b00bcc19 SHA-256: ad51252baa60398c3fa767e534649a29bd9e51bce4540a4612a9fe765606aadb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure URL is http://netcdn.co/app/431946152/roblox-hack-mobile-download-game-hack, which is associated with known malicious redirectors. The document's content and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious links and the ML classifier output indicate a high likelihood of malicious intent.

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/roblox-hack-mobile-download-game-hack In PDF document text
    • http://www.my-travel.com.hk/upload/files/funn-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/nasl-roblox-a-cheat-engineden-hile-yapilir_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/oginject-co_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-face-roblox-face-anime-girl-blushing_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-download-hack_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-generator-no-download_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/adventure-by-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-20210-robux-for-free_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_off00002f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F72 22100 bytes
SHA-256: 01c54e38f6a32c6b9f22e801e1ae5fd8fbd3132940224638bfc30df5fe71cb82
font_01_sfnt_off0000604b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 19476 bytes
SHA-256: edf8b09ccdc06f15a3fd6112e59f2d8faf958b3056b004bdb9093e776778d557