Malicious PDF — malware analysis report

Static analysis result for SHA-256 2703215b666a24bd…

MALICIOUS

PDF

34.9 KB Created: 2021-06-19 22:57:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2dc1e6ba872d5efecc5899b98858a600 SHA-1: 6a2914cd5ebea6f24c530c54f8939ecebe5de5ca SHA-256: 2703215b666a24bd44893eb0ceae94792de3164b8e72ebe2413806e55575e816
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and lures for game hacks. It presents a fake CAPTCHA to deceive users into interacting with a malicious URL. The primary malicious URL identified is http://netcdn.co/app/431946152/all-code-is-hacking-simulator-roblox-game-hack, which is likely used to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/all-code-is-hacking-simulator-roblox-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-generator-no-download-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-cpdes_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-cash-script-ultimate-driving-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/all-twitter-cheat-codes-mad-city-roblox_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
stream_002_off0000302c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x302C 22508 bytes
SHA-256: 500a43695c7636b7767c2248a5426cc5d7fcc9f16a997ed97d3db3875774e77c
font_01_sfnt_off00006239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6239 19452 bytes
SHA-256: ee6f9e4222ecd2e01ede0866330db1bcbaa7572b64ca7950d2e6845f4f83d8c0

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