Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa63d680c9c3334…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 05:15:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 548ca1a24611d67f013179b6aebb9319 SHA-1: 0989334dff445567e78333b8acbe3bd3be3a27ba SHA-256: faa63d680c9c33342f9b5af661e288566211030034818dac72027d93b37cbe8d
260 Risk Score

Malware Insights

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

This PDF document is designed to trick users into visiting malicious websites by offering game hacks and free spins, masquerading as a legitimate download. It employs a fake CAPTCHA to coerce users into interaction and requests sensitive recovery secrets, indicating a phishing or credential harvesting attempt. The embedded links point to known malicious redirectors and infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • 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-free-spins-today-daily-links-game-hack In PDF document text
    • https://mbbs.hr/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-coins_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_off000047ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CA 25760 bytes
SHA-256: ede1e719c3a684d06b206b687538ca634f17b0de8f9fc572dd6084b5a4f69c0c
font_01_sfnt_off000081e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E4 18652 bytes
SHA-256: 52d597ff4b9023df6b3510b92f87dc1d2329aed0448bc9fa59130058567cb992

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