Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddd8e05684be1da…

MALICIOUS

PDF

251.3 KB Created: 2021-07-06 16:37:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 41fa6c9267293292026a1239d6f5aa9f SHA-1: 1d7c8453dd258477d5033ac5793be2636945bb07 SHA-256: 7ddd8e05684be1dab2d30a7ad3c590252d76afdb92efad09444b70a990d9ea70
258 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1553.005 Mark-of-the-Web Bypass

The PDF file contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector infrastructure. It also exhibits characteristics of a fake CAPTCHA and MFA harvesting lure, impersonating Apple. The embedded URL is the primary IOC, likely leading to a phishing or credential harvesting page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 8

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-400-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
  • 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-400-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-app-that-sends-code-to-your-email_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-hack-download-roblox-minecraft-windows-10_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/fond-dcran-gamer-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/como-hackear-cuentas-de-roblox-real_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/https-growbux-net-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-generator-only-enter-password_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-lumber-tycoon-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_off0003809e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3809E 26028 bytes
SHA-256: cabb5a0deeec0d9e7ae984f5b3742093e9008263b38bb5b4fc6fb62e9a06ffef
font_01_sfnt_off0003bde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BDE2 18360 bytes
SHA-256: 22eb2d95eae0fd25672867e3a03e1422cbbd1e86f0fd1322be256af54719828f

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