Malicious PDF — malware analysis report

Static analysis result for SHA-256 53db40eb289f21ec…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 11:55:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4022dc7292eb9283fb6c0e3e680d17cb SHA-1: 4d57127916a6450ae98d324990505915ad9528d4 SHA-256: 53db40eb289f21ec0896e3cabc74e164bf40860cdc541131cb583336888beed4
160 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 generators to entice users into clicking malicious links. The primary link directs to known malicious redirector infrastructure, indicating a probable attempt to download further malware or redirect to phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious workflow, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-coins-for-coin-master-blogger-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-buildermans-password-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/where-tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-cheats-for-ios_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/pokemon-go-free-gps-hack_GM1094591345.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-simulator-free-model_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/monney-hack-for-royall-high-schol-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-someone-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-accounts-rich_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-download-no-survey-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/changing-script-to-make-stuff-free-on-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
font_00_sfnt_off0000308a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308A 22496 bytes
SHA-256: e5a03ed987e96c84a0b0c6ccb19dc004ca3866ce0d7e199c6778350ead7dc9f0
font_01_sfnt_off000062c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C3 18288 bytes
SHA-256: 4d8a9a5f845e6a4543ff8d893a9e279bb8bc764ff82ea70c3d9fb3020af74c46

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