Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0236af69b39eb4e…

MALICIOUS

PDF

250.8 KB Created: 2021-07-04 11:18:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0a25ed3313f376c9172fedb2e728567b SHA-1: 49adf7068af20efb4102008734179e8b963cfec9 SHA-256: f0236af69b39eb4e4d299cea5ea7ba4dbcc2a117e35963915bdaf435b5b4647d
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-earn-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-earn-game-hack PDF link annotation
    • http://otomasi.stikesmuhgombong.ac.id/repository/can-you-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/free-roblox-code-generator_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/hpw-to-hack-roblox-android-step-by-step_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/hack-devil-fruit-one-piece-roblox_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/descargar-roblox-mod-hack-apk_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/roblox-generator-for-free_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/roblox-hack-scripts-to-fly-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-link-spin_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_024_off00037f59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37F59 25928 bytes
SHA-256: ae869ea6a5a08466c60f2304851a704d35bd7a1521a06b89d5caa8aed34fec87
font_01_sfnt_off0003bc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BC76 18124 bytes
SHA-256: 129e250468f867d23814bc23ea40956ae607332215b2020fc8e9eabfb4471dd7

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