Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4b52dd4f3ff7ca…

MALICIOUS

PDF

46.6 KB Created: 2021-06-09 16:18:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0ed3630f9b4103a411f8942c5fc9193c SHA-1: e2f48acff2f421d0a8517bc1f7c7f782820fbc31 SHA-256: ee4b52dd4f3ff7ca818bfc43c11de5d60c11c6f765f82a21735ac12328c9072c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users to malicious websites, masquerading as game hacks or generators. The primary redirector URL, https://netcdn.tw/app/431946152/roblox-download-free-chromebook-game-hack, is flagged as malicious. The document body and embedded links suggest a social engineering tactic to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/roblox-download-free-chromebook-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-into-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/tiktok-free-3d_GM835599320.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hacks-to-use-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/earn-free-robux-for-roblox_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_off00005407.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5407 26488 bytes
SHA-256: 39d7e3e0951542c674c0aa62da5a07ea591844d9346d970f1122be97237f5a72
font_01_sfnt_off00009105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9105 19280 bytes
SHA-256: dbea205a5eafde8c52629ee82751ac19337bc1930a36cc7bea635a23877a1d7e

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