Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d814938ed5a7d1…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 02:33:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 33c4b146681bbedb2a4ba8ecc7498cc6 SHA-1: 8695ad3eaab0bfa6953c1b5e06286d5f704aaee3 SHA-256: b3d814938ed5a7d1f47bcb088b8cfa9dbee30f2161631f28e8e0b6b242804e4d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/how-to-get-free-robux-on-computer-no-hack-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/bebe-rexha-i-got-you-cheat-codes-remix-roblox-id_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-no-human-verification-or-download_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/easter-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/100-percent-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-scam-game-uncopylocked_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-commercial_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-of-roblox-2021-in-game-like-counter-boxing_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/ben-10-roblox-cheat-codes_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
font_00_sfnt_off0000334d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x334D 22232 bytes
SHA-256: 703e40ec447a614c32e2dc7bb87ea7cf021d2ecfb435ea3b79e3f71df58cb998
font_01_sfnt_off00006460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6460 19588 bytes
SHA-256: ebfb17e2800d1209c9d60770c338a5928c78b445280e0c100ef42c3ac34391bd

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