Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f26eecfda80c09…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 06:40:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 470445764da019f54f3d27d229336cf9 SHA-1: 5ab72464fdb61493917ff2865c2f11f6ceba976a SHA-256: 83f26eecfda80c0912a4370867bca54ba4ce26ab03f192dbe6e55fe4c0e3644b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and free items, indicating a lure to potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of external links, likely for SEO manipulation or to distribute malware. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/coin-master-free-stuff-links-game-hack PDF link annotation
    • http://librarysenior.com//repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/tiktok-free-login_GM835599320.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-for-pc-free-download_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_off00004f80.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F80 23904 bytes
SHA-256: 0a3f2ae6f60c19e87baa56255653fc46928b01f1ad5e82c92c368afe0a95d965
font_01_sfnt_off0000860f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860F 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00008ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFA 18020 bytes
SHA-256: 4a31ce4ad0cb96257d099b2c128198fdf2dff202f4a157870e4b630be465ac9f

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