Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf56d3469345ef2…

MALICIOUS

PDF

47.5 KB Created: 2021-05-16 16:29:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 384d9d6fffc228c9cec72efc366f7389 SHA-1: 482667dda8766357776f6765582dd305a6e9c4d8 SHA-256: ccf56d3469345ef225cb0bdd7c23693c0c429ce56b968a35f2bd93c94dc0faa9
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure and 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 0.9013

Heuristics 6

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/earn-roblox-game-hack PDF link annotation
    • http://asandawireless.co.za/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://asandawireless.co.za/images/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://asandawireless.co.za/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://asandawireless.co.za/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://asandawireless.co.za/images/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://asandawireless.co.za/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://asandawireless.co.za/images/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://asandawireless.co.za/images/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://asandawireless.co.za/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://asandawireless.co.za/images/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://asandawireless.co.za/images/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://asandawireless.co.za/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://asandawireless.co.za/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://asandawireless.co.za/images/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://asandawireless.co.za/images/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://asandawireless.co.za/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://asandawireless.co.za/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://asandawireless.co.za/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://asandawireless.co.za/images/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://asandawireless.co.za/images/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0D 28404 bytes
SHA-256: ac1bc291b4d3d8df62eea002bfc82cd5708afea48c9b5a8d6e7ff8c2a3bca6e0
font_01_sfnt_off00008b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B13 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9825 18012 bytes
SHA-256: 93bf5a204a867a3cc71fe61d8ba690d7c5ca8a3d58d56ec60b4692a28d6ed968

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