Malicious PDF — malware analysis report

Static analysis result for SHA-256 de67901d008965eb…

MALICIOUS

PDF

33.6 KB Created: 2021-06-26 07:15:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 28988e4a558bcf9e7b46eb4d89bf453f SHA-1: c3f31ce9b6f32691a931608bca304095cbe14413 SHA-256: de67901d008965eb60614a0fa3f3ff2ed121497077dae9c4c118dd332028723f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links designed to lure users into clicking on "game hacks" or "free currency" generators. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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/i-robux-hack-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/can-you-ever-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hacks-robux-gratis_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/appstore-free-roblox-for-computer-game_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-human-verification-no-survey_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_off00002e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2F 22216 bytes
SHA-256: 1fb85ff641d6443ad2c0b9b723dc3ca0d3b4013ebfc8d27a1d7c6512890fb396
font_01_sfnt_off00005f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F12 18724 bytes
SHA-256: 931cf6f19ea8237d7aa0f3eb1f04fc3b06518852fee4f736b162dfa7e617e446

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