Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce7cd373f448933…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 09:45:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9eb8f3e3c0da42a090a724bed6d3c759 SHA-1: 2a0a703158049a5da0010b7b1c5ce4534517c9cc SHA-256: fce7cd373f448933a313de2dc4ae51f77aec1d4fef2e1ba8dbcc278b06967c32
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, including one specifically for a 'free game hack'. The document body and heuristics indicate a fake CAPTCHA or human verification prompt is displayed to trick users into interacting with these links. The primary link, https://netcdn.xyz/app/479516143/minecraft-bedrock-edition-pc-free-game-hack, is likely the initial stage of a malicious download or exploit chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-bedrock-edition-pc-free-game-hack In PDF document text
    • http://mbbs.hr/files/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/simplysarc_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-to-village-3-in-coin-master_GM406889139.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_off00004a4f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4F 24708 bytes
SHA-256: 5154a1cfc42c67b05e11d920c4aedb5f177404eb56941e1db5c00ef08740b5fe
font_01_sfnt_off000082be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BE 18424 bytes
SHA-256: b5a3fec1d7f3ae012b17f1950b72f1e02224ae7313c4d9c9d68c8b40b26cb064

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