Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1398b4f16586a2…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 13:14:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8c1740819cacb3f49aa6670c8db2e7d0 SHA-1: bffc1cf4f4c2bd02201aa505bbb65e7e4daa60f2 SHA-256: ce1398b4f16586a226a7c3acddcf7247c553f6ecf081b3f0115fbb24dbec8011
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs points to a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded links suggest it is designed to trick users into visiting potentially harmful websites.

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/431946152/free-robux-thumbnail-game-hack In PDF document text
    • https://lib.insan-unggul.ac.id/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/pokemon-go-no-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-games-that-actually-work-2021_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_004_off000051f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F0 25084 bytes
SHA-256: 5b88cc912a696aed9ae2f9893cfce85901d0e581c7589bcaada764aa10276517
font_01_sfnt_off00008b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B84 18864 bytes
SHA-256: c969eb26f29950990ddccbf0eeab0a7af3119d1c9c7ebc0fee97903357bc58cd

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