Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76eb28689b4bc3f…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 00:02:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e54be3135457b20c5587bc5f1b2bac49 SHA-1: ab968f449a39b0a9a8cb4a54af42dec9ab370219 SHA-256: b76eb28689b4bc3f0673c94ea5fcae4532d1e0eaa15f8851603381b160ae8ab1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and 'game hacks', directing users to a suspicious URL. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a phishing or scamming attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.co/app/431946152/free-robux-live-youtube-game-hack PDF link annotation
    • http://cintabaca.org/katalog//repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-cheat-engine-speed-hack-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-word-search_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/cone-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-registration-right-way-up-cheats_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9A 22124 bytes
SHA-256: 5f297e73184c6e4276486ac3aac8ba8b7c101b1bf1ab1cdfa9cedebe7954f531
font_01_sfnt_off000060b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B6 19216 bytes
SHA-256: 9eadbc29e056fc60aec8add69ff613836e7514568e198397e7bb7bfd5d573572

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