Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed1b646695a4f6f…

MALICIOUS

PDF

250.8 KB Created: 2021-07-05 11:02:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6fff9bea3301b7ca41913f19b38198b9 SHA-1: f8ebec668a7b5fa3ca5699d4ad417ed78684b3be SHA-256: 1ed1b646695a4f6f5e33b68451d19facc92c9803502b62011377bc9bb5b4685c
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1555.003 Credentials from Password Stores T1078.004 Cloud Accounts

The PDF document contains multiple lures, including a 'game hack' and a fake CAPTCHA, designed to trick the user into clicking a malicious link. The link leads to a site that impersonates brands like Apple and prompts for MFA or credential harvesting. No scripts were extracted, but the document structure and embedded URLs strongly suggest a phishing attack.

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-100-bonus-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-100-bonus-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/hack-magic-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/get-me-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-speed-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/cuentas-gratis-de-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/youtube-how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pubg-uc-10_GM1330123889.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_off00037e29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E29 25928 bytes
SHA-256: a1d6e19fe6f2db7764981453732117b9d72b79f91548b1a4fc53a89af2255426
font_01_sfnt_off0003bb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BB3D 18548 bytes
SHA-256: 9940b419c9d44e5eca6db426cfb8691f6fd3b114d5424fbc3ddd93fca3f065e6

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