Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ea3a3f050705ec…

MALICIOUS

PDF

49.9 KB Created: 2021-06-04 01:35:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f8d02ec2b717b5d96bc6efe945abc8cf SHA-1: 1887eb4d702673066a897c21c8604e71c6fc051c SHA-256: 37ea3a3f050705ece66ff726bd8dba9d708313f09a0546b2bd18d8db6127377e
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 0.9796

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 https://netcdn.online/app/431946152/free-robux-no-verification-no-download-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-link_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
stream_004_off00005580.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5580 26760 bytes
SHA-256: 7706b2baae2e8015f26ea9901d372b6d99007f94f4f616f2ae5429d8fb0f5989
font_01_sfnt_off00009408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9408 2844 bytes
SHA-256: d4efd49219a7ff6424c923a6ccef5b7e1750ded18bbd79546f2ad196ddc76c43
font_02_sfnt_off00009dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC8 19180 bytes
SHA-256: 529ad809d39cb86513f1fd0a7c59ac13158e8644a31ce1f1c8620f9d5ad40971

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