Malicious PDF — malware analysis report

Static analysis result for SHA-256 e912188a71baf731…

MALICIOUS

PDF

250.3 KB Created: 2021-07-05 11:43:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 31f14eb458a8df5e786116e9433a935c SHA-1: 0406f1b611bab9221d965abfd2a2499542a3812c SHA-256: e912188a71baf731aec6e6a80ba8fbcbe8becb41bb2844a7a096778827b71f4e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal or Modify Data T1204.002 Malicious Link

The PDF document contains a link disguised as a game hack generator, impersonating brands like Apple. It employs a fake CAPTCHA and MFA lure to trick users into clicking the link, which likely leads to credential harvesting or further malicious activity. No scripts were extracted, but the embedded URL and lure tactics strongly suggest a phishing or credential theft attempt.

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/how-to-pubg-uc-carding-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/how-to-pubg-uc-carding-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/pubg-uc-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-accounts-without-passwords_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-admin-commands-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/safe-cheat-engines-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/outfit-code-free-garcon-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-no-sign-in-account-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-cheat-codes-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-cheat-in-weight-lifting-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-da-hood-hack-or-glicht_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-without-builder-club_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-hack-2021-december_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
stream_024_off00037b51.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37B51 26028 bytes
SHA-256: 56b4c526de78e2a586e1c787f31dccdcdff83bd35e9eb1a7ec573ad16f5c4bed
font_01_sfnt_off0003b889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B889 18724 bytes
SHA-256: 5ae85ae0e6765119eeed26baa3b873a31a573fcbc8fd0e79f4ef4e5e3de6317c

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