Malicious PDF — malware analysis report

Static analysis result for SHA-256 984c3792a5f6ca90…

MALICIOUS

PDF

46.1 KB Created: 2021-05-14 14:53:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1f11aee54c544d34826328cc366c0833 SHA-1: 179e8d5d8f78c86967631977defb053a839a186d SHA-256: 984c3792a5f6ca90441a6961b1b80231be0e1af3599fc005ca46494ad3545664
200 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' which redirects to a malicious URL. It also displays a fake CAPTCHA to trick users into interacting with the document, likely to execute embedded content or trigger further malicious actions. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-change-your-username-on-roblox-for-free-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/431946152/how-to-change-your-username-on-roblox-for-free-game-hack In PDF document text
    • https://newenglandafs.com/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://wolfzscriptsIn 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_off00004a0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0E 25184 bytes
SHA-256: 9265e433facbb078eea3c2a77b98db1afa3890877d0b36ef3eb3b9f6ffe108fc
font_01_sfnt_off00008490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8490 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E40 19540 bytes
SHA-256: 93794ea5a6c5acfa8b9ea336c7fa02a00f4c27ab4f9922f3137d25115e5793d6

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