Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9eec6e492a09965…

MALICIOUS

PDF

43.8 KB Created: 2021-05-15 09:15:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fe8d19c6c35ba09e82a9e78ffa05f028 SHA-1: 791265ebd8645a7fe6d9df0c54c887beecde6e44 SHA-256: d9eec6e492a09965391492fd979433789d07cc72214f537fac663393fdced1f6
240 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirectors and scam sites, impersonating brands like Facebook to lure users with offers of 'free spins' or 'free Robux'. The document also displays a fake CAPTCHA, likely to trick users into interacting with malicious links. The primary malicious link identified is https://netcdn.xyz/app/406889139/free-spins-coin-master-links-app-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 6

  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/free-spins-coin-master-links-app-game-hack.
  • 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.xyz/app/406889139/free-spins-coin-master-links-app-game-hack In PDF document text
    • https://creationegyptco.com/userfiles/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F7 23900 bytes
SHA-256: c8121584f970b3aa7434863682884cbb6d03de5e75523e7100780e90166a99de
font_01_sfnt_off00007f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6C 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8956 18056 bytes
SHA-256: 84aa23fcc6462284d9de24dc4e48e5adae58ea47093056a13574472db41c2ce7