Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddd5441bb78f14b…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 01:59:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 14e0f1c5099af510183214e0a44e430f SHA-1: 93fc5a2934e5c2c8e1d08a1dabbfa27433730838 SHA-256: bddd5441bb78f14bd46e0544d6759ba5514f669255de1ac7a0dfe58b546dd8f0
122 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 brand-impersonation credential phishing. 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 0.9865

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/479516143/how-to-get-a-free-minecraft-account-game-hack.
  • 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.online/app/479516143/how-to-get-a-free-minecraft-account-game-hack PDF link annotation
    • http://oca.undil.tl/repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-support_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux-for-free_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_off0000546b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x546B 25048 bytes
SHA-256: 2210809dcca4f0f6e1014bb8a7749b8e000c4727279d0fe256c54b2055986a31
font_01_sfnt_off00008bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFC 18016 bytes
SHA-256: 5a2a7e753a917a0c0776144ed208a5331958d262d8364954408ce80ee198d92a

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