Malicious PDF — malware analysis report

Static analysis result for SHA-256 43fe09d1716b5427…

MALICIOUS

PDF

53.2 KB Created: 2021-06-09 08:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e6fb9bbf86fb30cd37f3215d773375ff SHA-1: 0503db92f5f5ae188a33adbc7a41ac1776450b98 SHA-256: 43fe09d1716b5427e28c7e01db8a124cbc5e581defc5f09c71c2b459ea82880e
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links to redirector infrastructure, masquerading as game hacks or free generators. The presence of a fake CAPTCHA heuristic suggests an attempt to trick the user into interacting with the document, potentially to bypass security measures or initiate a download. The document body also contains a prominent link to a known malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9607

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-get-a-free-umbrella-in-camping-roblox-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-whatsapp-tik-tok-status-download_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-codes-never-used_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-good-hacker-names_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-on-huawei_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-anti-cheat-script_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-icebreaker-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005009.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5009 29152 bytes
SHA-256: ee784d1b9920376e20512942958c80064056da0c54c025c4a8a90eb3dcd9284d
font_01_sfnt_off00009309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9309 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00009cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBB 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9CD 19472 bytes
SHA-256: 4a98dd07d8c9456d10877ab90ace90bdb2f6eefa4b98b78dc97cc89a5c769441

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