Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e41b3b9dadca9a…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 02:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 62bfe38b0040d6040181763dade94ea2 SHA-1: ea5ee1a1d7946b412784fc18b35ac268654807a7 SHA-256: 45e41b3b9dadca9a0d4ea46a33330b2521be8c782420498812e15baa2f6f1b74
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to trick users into clicking malicious links, disguised as game hacks or free generators. The primary malicious link identified is https://netcdn.xyz/app/431946152/i-want-free-robux-game-hack, which is associated with known malicious redirector infrastructure. The document's structure and embedded links suggest an attempt to exploit user interest in free items or cheats to deliver a secondary payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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
  • 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/431946152/i-want-free-robux-game-hack In PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.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_off00004956.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4956 24756 bytes
SHA-256: 86b913cc51e0b112b6586e95a9a7955ea9809b555ef43268a0c305438baabff8
font_01_sfnt_off00008280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8280 18544 bytes
SHA-256: 21c84a9f4ed3b5496a815e3404d7d5cd07faeb2ee17584cb0226aa903f450845

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