Malicious PDF — malware analysis report

Static analysis result for SHA-256 b518cd58731a94cb…

MALICIOUS

PDF

48.2 KB Created: 2021-05-11 13:32:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 49870e60443e0a7620a034cc990beec5 SHA-1: 60386e45e4df8b7743d1f29a8ae6cbc0943b8ed9 SHA-256: b518cd58731a94cb482dc434d761cb5651065f81112d8a38517b9c7de6987597
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically luring users with a 'game hack' theme. The embedded URL, https://netcdn.xyz/app/479516143/minecraft-bedrock-server-hosting-free-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-bedrock-server-hosting-free-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a14.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A14 30424 bytes
SHA-256: 39cd215d968da95cfb00cce9a1c4c4d0bc200e7c52dd7f22eea9431e9a480e56
font_01_sfnt_off00008f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 2884 bytes
SHA-256: 39f55ff620580245101a1eb5492379c1c68fe74b6e3c199a89e1e1fa2dfa3e44
font_02_sfnt_off00009905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9905 18672 bytes
SHA-256: c45ccb7756ad31f0eb1659f3c43916dbd490baa96d6c6b1730beaec095da97be

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