Malicious PDF — malware analysis report

Static analysis result for SHA-256 8453b4ab7230fe20…

MALICIOUS

PDF

45.7 KB Created: 2021-05-30 23:09:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bc5031aa0d15b37d7bb2100c5e340e14 SHA-1: 05de44adb2d5fbf3d7c1b1d82fc271d2fcb2e581 SHA-256: 8453b4ab7230fe208ce161fcc4cd6b08b3d8ca9d00008d0c3395a50fbaf8fcf5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary lure is for 'Minecraft Pocket Edition Free Download', directing users to a URL associated with malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9580

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 https://netcdn.xyz/app/479516143/minecraft-pocket-edition-free-download-game-hack In PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-tiktok-likes-no-human-verification-or-download_GM835599320.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_003_off0000573d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x573D 24672 bytes
SHA-256: f9776cc1fe5a8daeff97422a0d7bb78bf170d2025a4b3c76f270fac926ce96c4
font_01_sfnt_off00008ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC9 18616 bytes
SHA-256: 74c3d0dac38db02fae044005a19145e6493ffdefda41676fc7dac63f0b05f007