Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3f27de7bfe3117…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 15:26:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 860ca11550917d8acac7e80b4c856b0c SHA-1: 4551e8cecc86bd2e0a2111179080d0eda36a7547 SHA-256: 3a3f27de7bfe3117b772b2c15b88e4c0a66e7e041373698afbadea15ff2c130e
122 Risk Score

Malware Insights

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

This PDF document employs a common lure of game hacks and free currency to entice users. It displays a fake CAPTCHA, a known social engineering tactic to trick users into clicking embedded malicious links. The primary link, https://netcdn.xyz/app/406889139/coin-master-spin-hack-trick-game-hack, and numerous other related URLs suggest a campaign focused on distributing potentially unwanted or malicious content disguised as game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/406889139/coin-master-spin-hack-trick-game-hack PDF link annotation
    • http://optiquedelavaunage.com/images/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-hack-iosgods_GM406889139.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
stream_003_off00004783.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4783 24928 bytes
SHA-256: 0e88d5eb8e045b20dae85df48aaddd8499ce5630ec550311a3cf500cbb4e3c69
font_01_sfnt_off000080ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80ED 17892 bytes
SHA-256: 4bfb4f0e693ff7770b94f95e309e8f86fd0b36da1cc4d74f533703e272a9a7c8

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