Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2b38746e7baf77…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 02:07:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5618cccdcdabc63403cb299d389f00a1 SHA-1: dfaa8ae45cd54b95bf3a18b880ccddfb73580ede SHA-256: cb2b38746e7baf7738c1610b7efa793172233254fcdc4d300b4b0398d107f63c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to a malicious website, identified by heuristics as a game hack generator lure. The document's content and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting a potentially harmful site. While no scripts were explicitly extracted, the nature of PDF redirection often involves JavaScript execution to facilitate the redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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 https://netcdn.online/app/406889139/coin-master-free-spins-cheat-game-hack In PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/pokemon-go-free-box-march-2021_GM1094591345.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-coin-master-spins-no-verification_GM406889139.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_004_off00005350.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5350 25012 bytes
SHA-256: 603eabd771034944abcc5239ce0beeea17f4ffed52fb06ab52ed8825a27c958e
font_01_sfnt_off00008b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9E 18052 bytes
SHA-256: 9bd717b0e04310867829ca511b483eebbd60050a5b8b31305794fbcb17f8519e

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