Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9f594e8d335330…

MALICIOUS

PDF

44.0 KB Created: 2021-05-17 02:02:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8deab62fe8739100756024a23cd4bda8 SHA-1: cb80dd2c2d1a772a27af31ece9b5a2977ee84ea2 SHA-256: 2f9f594e8d33533076701c14efd6a21ee209d94a1f2761eff94fa1f358e3d240
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA and a lure for free game items to deceive users into clicking malicious links. The document contains multiple links to known malicious redirectors and infrastructure, suggesting an intent to distribute further malware or lead users to phishing sites. No scripts were extracted, but the PDF structure and heuristics strongly indicate a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-roblox-girl-hair-not-a-model-game-hack In PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/getrobux-info_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/to-get-free-robux_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_003_off000049d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D3 27116 bytes
SHA-256: 4c9a405e413ec385cee5d8846e3c29171ca7b034e9ccad133671faf247f50263
font_01_sfnt_off00008858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8858 18772 bytes
SHA-256: 66482e13b1b0d91169bd4f4980226da82ba760cd479aff25d2e3a1e388705405

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