Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee46aff39f134184…

MALICIOUS

PDF

250.2 KB Created: 2021-07-08 17:49:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7f4eb609186c46236ec3c64e3b9dbdeb SHA-1: 82437b1cf54871254c3e0f9c11a6d73e8702a957 SHA-256: ee46aff39f134184b1698c94dff7c3706833e4127ff071ff99f23f272cec5489
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-severity heuristic indicating it links to a game hack generator, impersonating brands like Apple. It also displays a fake CAPTCHA and uses urgency lures to trick the user into clicking the malicious link. The primary IOC is the redirector URL, which likely serves as a gateway to further malicious content or credential harvesting pages.

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-nepal-price-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-nepal-price-game-hack PDF link annotation
    • http://stitqi.ac.id/website/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/download-free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/pubg-uc-nepal-price_GM1330123889.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coins-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/boost9-com-roblox-hack_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_off00037b87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37B87 26284 bytes
SHA-256: 016b6def3ade9167407328f3d8e8bc773d0d8ad3856a23afcd0eeff490bd3303
font_01_sfnt_off0003b921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B921 18496 bytes
SHA-256: 9ba38eef2935247654556783178275a0de8937ba03abaa3fb762146cf61e9ff5

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