Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddfb576b01ba3ccd…

MALICIOUS

PDF

44.7 KB Created: 2021-05-15 10:53:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7ce62d29344c1a8583a503af2dab39c1 SHA-1: d57b9cfd61e211f46c78e5bad93d286e0a3784eb SHA-256: ddfb576b01ba3ccd3e227095edcdcf5cc2c7e3cbe2dad105303ce091cfef5ca3
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. It also displays a fake CAPTCHA to trick users into further interaction, likely to download a second-stage payload or execute malicious code. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-please-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-robux-please-game-hack In PDF document text
    • http://thomas-hartl.at/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://thomas-hartl.at/images/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://thomas-hartl.at/images/coin-master-game_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://thomas-hartl.at/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://thomas-hartl.at/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://thomas-hartl.at/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://thomas-hartl.at/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://thomas-hartl.at/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://thomas-hartl.at/images/free-spins-for-coin-master-2021_GM406889139.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
font_00_sfnt_off00004767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4767 26644 bytes
SHA-256: d6867cb6514bbf7504f848b85a420a6cbe84774edc86c1216a13c8b185da72f1
font_01_sfnt_off00008187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8187 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B96 18472 bytes
SHA-256: a4143b220e35e332e52efa777ecf598d1a164c1d6c5ab1887881bf2674d2e637

Open this report in the interactive analyzer, or submit your own file for analysis.