Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f18fd21e56a199…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 21:20:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f14bcff587f2016463d27b472281f7dd SHA-1: 8f62a317b43d3a6d5584dd51c3af3ee2415076b1 SHA-256: 24f18fd21e56a199311bd260529df97f4df915c07894822ce2d9b6bde0424448
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/free-roblox-promocodes-for-roblox-game-hack. The document body and embedded URLs suggest a lure for game-related cheats or items, which is a common tactic for phishing and malware distribution. No scripts were extracted, but the presence of malicious links indicates the document is designed to lead the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/free-roblox-promocodes-for-roblox-game-hack In PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/cheat-engine-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/constructeur-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-free-shirts-on-roblox-no-bc-2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/new-roblox-retail-tycoon-hack-exploit_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/pokemon-go-free-roam_GM1094591345.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-earn-robux-for-free-2021_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_off00003017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3017 21984 bytes
SHA-256: 93905a9771f4702d8054ac0308599749384e31dce6b7f4c038493f0b4b6a607b
font_01_sfnt_off000060ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 19236 bytes
SHA-256: 0441765594afd8f0f0f19051fc25cb9007e0dade05338edf82f87d93601f4794