Malicious PDF — malware analysis report

Static analysis result for SHA-256 47baf3d3b1ffa5a0…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 10:53:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 52b0b7ec04442b29e5f8c0bac31434cc SHA-1: 80f4f84566a0ec900ec971145517b66310918911 SHA-256: 47baf3d3b1ffa5a0fadeda6fa71b51ee43459320a968cd8624f25eefa5f09f6c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9980

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 http://netcdn.tw/app/431946152/roblox-online-free-no-download-game-hack PDF link annotation
    • http://apotema.com.co/ufiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/hack-speed-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-without-survey-or-verification-2021_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-do-hack-your-money-on-roblox-ultimate-driving_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-html-pastebin_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/i-robux_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_off00002e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E01 21852 bytes
SHA-256: a6bf211557522cd2290acab88534483a2a9be5d1b4d5836ec13648a4fc31da8e
font_01_sfnt_off00005e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E40 19276 bytes
SHA-256: b38f8f12ef08a1ab95ae278c1cbb6a6ad2930ce96fc7aecc851d669e5ab47f9e

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