Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72fbd3d80bb6126…

MALICIOUS

PDF

250.2 KB Created: 2021-07-06 23:40:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c08f1c6b6642e06c9d640d6d9b6813ae SHA-1: ab3351140a00610b23763d2598c91910ea46d5c5 SHA-256: c72fbd3d80bb6126c29afd099ba61b80ee7c784b03168ad8780800adb9214624
180 Risk Score

Malware Insights

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

This PDF document was flagged as malicious. It uses brand-impersonation credential phishing, a fake-CAPTCHA lure, an MFA/2FA-themed lure and an urgency-based 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 clean score 0.0098

Heuristics 8

  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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: http://netcdn.tw/app/1330123889/pubg-uc-website-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/1330123889/pubg-uc-website-game-hack PDF link annotation
    • http://www.inoxograde.hr/files/roblox-paginas-que-te-dan-robux-2021-sin-hacks_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-hack-on-a-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-2021-android_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-hack-apk-download-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/casper-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/descargar-hack-deathrun-roblox-super-speed_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037b3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37B3A 26044 bytes
SHA-256: f46bc9c4ba019065810546ab354198ac659d69e97820a1d8a06c47101052953f
font_01_sfnt_off0003b8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B8B0 18548 bytes
SHA-256: 26b4cf2500b1dbb9fc04137b079da0a0baad7ef3e9bfd7449122ac0eeeac515d

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