Malicious PDF — malware analysis report

Static analysis result for SHA-256 924ace80f67e2501…

MALICIOUS

PDF

43.6 KB Created: 2021-05-16 17:37:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f2ed08fed68484cd5166953bd556614b SHA-1: b7baaaa969b8f3178dff22ddec9fc5ea5f793a55 SHA-256: 924ace80f67e250125e830502f8ff527f5ac4f82b46bdfacee010c18670bef3b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) 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 0.9969

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.
  • 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/games-that-can-be-hacked-game-hack PDF link annotation
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/roblox-land-free-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_off00004d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D69 25432 bytes
SHA-256: a766802593f319a3ee3427aa446771d59cb7980e1844a4c4eff39d9b28b3f6f9
font_01_sfnt_off0000883d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883D 18304 bytes
SHA-256: dfa8437c72db791aace135511bda9208016fcfe346c17eaaea4b366062f3a020

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