Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e0762594e99531…

MALICIOUS

PDF

32.0 KB Created: 2021-07-08 05:52:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 69b796bf4118bea50591f092b5320e91 SHA-1: 4426123365350f983e5df5eee3cb6802de49817d SHA-256: 99e0762594e99531698c86fbacda3b10250934378e58189429c6a27971aa1f44
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure URL is http://netcdn.tw/app/1330123889/which-pubg-uc-is-best-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into clicking these links, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/1330123889/which-pubg-uc-is-best-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-bee-swarm-simulator-honey-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-online-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-no-surveys-and-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-trello-gold-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-free-obby_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-free-shopping-apk_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_off0000286d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x286D 22056 bytes
SHA-256: 77cc8d9dd17cd5366bf9e4d54141b9b3daabee9851f310ea17ea06f32db77c52
font_01_sfnt_off0000592f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x592F 18712 bytes
SHA-256: 64b102f68dc84383916394feb527f597b8d4c018ac24f4eb19f6396938d21f10

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