Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6276e0cff2cba66…

MALICIOUS

PDF

36.1 KB Created: 2021-06-23 16:27:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e0bd6997e15f3fc7c83ec68052319fcf SHA-1: 0773ae9d303ca34240c125c0dabd6fe48d2e7b51 SHA-256: e6276e0cff2cba668194adbec227f3125dfd16d7eadf7789a6d114e394272ec5
220 Risk Score

Malware Insights

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

This PDF document employs a lure of free game hacks and in-game currency to trick users into clicking malicious links. The document contains numerous links to redirectors and SEO-optimized PDF files, indicating a link farm designed to drive traffic to potentially malicious sites. The primary redirector URL is http://netcdn.co/app/431946152/btools-roblox-hack-jailbreak-game-hack, which is associated with malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/btools-roblox-hack-jailbreak-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-decals-for-roblox-pizza-place_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-hack-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-games-that-give-you-free-items-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-gamingwithkev20219-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/was-roblox-hacked-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-coins-in-reason-to-die-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-free-download-mac-full-version_GM479516143.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
font_00_sfnt_off000032dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DD 23492 bytes
SHA-256: 9d7d6eb3bce4974aa8d6e8c5680f9450144dd054ed9c1d7680a779155be20953
font_01_sfnt_off0000683c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683C 19044 bytes
SHA-256: 143530d5c50944513b36d0a42131d60d6644739f0e543133df596119076de472

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