Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12b0f1bb5e94241…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 12:26:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9fc980f6df37a861cf22de2a2d1c95c6 SHA-1: 5e8ec8923dc0212390e90df89972e91a15d3aa1b SHA-256: b12b0f1bb5e942419b6d821783e4c02e9874cc8bda9b924d0c764dfd27614714
200 Risk Score

Malware Insights

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

This PDF document employs a lure of "free generator / game hack" for Coin Master, presenting a fake CAPTCHA to trick users into clicking a malicious link. The embedded URL, https://netcdn.online/app/406889139/how-to-get-more-spins-on-coin-master-hack-game-hack, is identified as a malicious redirector. The document's structure and content strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/406889139/how-to-get-more-spins-on-coin-master-hack-game-hack In PDF document text
    • http://digilib-unirow.ac.id/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-daily-free-spins-link-today-2021_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_004_off0000524f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x524F 27048 bytes
SHA-256: ce43465b3f244e482f08a3a9438031f951de14757e20770fcaf7da70588ac499
font_01_sfnt_off00008fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB9 18056 bytes
SHA-256: c25be2ee10aa6c8dac98d181bff9bbb73a764afdf7857c2243de642e2757df86

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