Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bdf8e0c6fddec9c…

MALICIOUS

PDF

34.0 KB Created: 2021-06-25 19:05:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d85823bd358821003ecfbf5fb24a59b3 SHA-1: 4e59e27b9eb12582ddc327d1dfcdb919aed32de6 SHA-256: 2bdf8e0c6fddec9cb94c85e930e36b36b519571d6c432201625c1ee9211ba586
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 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 http://netcdn.co/app/431946152/instant-hack-robux-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/descargar-hack-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-hack-no-survey-or-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/comments-about-bloxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/games-on-roblox-with-free-boombox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-on-roblox-laptop_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-unlimited-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-admin-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-ad_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-island-royale-download-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/learn-lua-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-lua-script-for-one-peace-opn-seas-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cheat-engine-fonctionne-sur-quel-jeu-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-cheat-engine-62-robux-hack_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_off00002ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA0 22304 bytes
SHA-256: d296f4618059f54f0ef9f1391c7e433c06c88671a89ca9aea04859fea21be3d5
font_01_sfnt_off0000606a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606A 18824 bytes
SHA-256: 432aa6e98e1023f768caad8af44ec12e6de7ffc520e31de06f420c5c5156f3bf

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