Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee1f01e3f34710e…

MALICIOUS

PDF

43.6 KB Created: 2021-06-04 05:21:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e5fb758c89d991d215b2dd4e9e3d3f66 SHA-1: b46ad758aeacd049dcb5d67d1ea19db25e3d1af1 SHA-256: cee1f01e3f34710ea31b677ac8dc2b6fbad770f3c871fc82d7ec6f9782212854
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The presence of these lures and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. The document body, though heavily obfuscated, contains URLs that are consistent with this lure.

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/javascript-free-robux-game-hack In PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-t-shirt-black-free_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/games-on-roblox-that-give-you-free-robux_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_off00004d7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D7A 24848 bytes
SHA-256: afd491b6dbe06142d7a310a03c688bb472ca659f2a895aacefa10d9fd6f93eea
font_01_sfnt_off000085e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E4 18920 bytes
SHA-256: 37df68cbe6d620a6a908579d98e7a1ce8a765682fff888c408a64c9cb805dd83

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