Malicious PDF — malware analysis report

Static analysis result for SHA-256 7177f58aae37eb8f…

MALICIOUS

PDF

49.5 KB Created: 2021-06-09 13:16:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c2cd85e5826ed14b0812147c229a9595 SHA-1: 5dacbd6be6e72125ae300935cc84a9466ceb852b SHA-256: 7177f58aae37eb8ff829f58dee03822bef17cae46c8d5365e0aabacf61d9b8b7
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF document uses a lure related to 'game hacks' and impersonates Amazon to trick users into clicking a malicious link. The link leads to a domain that does not match the impersonated brand, indicating a credential phishing or further malware delivery attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit user interest in free items or cheats to compromise their accounts or systems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • 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: https://netcdn.tw/app/431946152/how-to-hack-into-roblox-groups-game-hack.
  • 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 https://netcdn.tw/app/431946152/how-to-hack-into-roblox-groups-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/can-you-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-hacknet-real_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-simulateur-de-vehicule-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/pubg-uc-buy_GM1330123889.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52DB 25952 bytes
SHA-256: 42b9375e02724d8f2d81af7ad5e89d5cbda454d44791dde9c742b2365108bc5f
font_01_sfnt_off00008d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2C 4660 bytes
SHA-256: b8980cdac4d025496d9fe039d8c05bb5b9bae1b804244a1f9c05e9663db72816
font_02_sfnt_off00009d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3C 18768 bytes
SHA-256: 5c4058f647d13443aff4276ce710216d2e4e8bbc5c0ca9bc138c66a124aacbef

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