Malicious PDF — malware analysis report

Static analysis result for SHA-256 5835e1f9ad8c2455…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 09:10:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 393ae070a95fe3d6ed3e32146cecd6ae SHA-1: dde9a872f0dfbf5bf748de56c333bdf9ef29fc3d SHA-256: 5835e1f9ad8c24556c11a8c393880a4dc799d020e0ed1cfe9fc191b1ee5f0caf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is https://netcdn.tw/app/431946152/how-to-look-like-dio-for-free-in-roblox-game-hack, which is associated with known malicious redirectors. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-to-look-like-dio-for-free-in-roblox-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/tiktok-free-fans-video_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/tiktok-free-without-downloading_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-500-spins-link_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
font_00_sfnt_off00004efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EFA 26388 bytes
SHA-256: 2cfd7b4d18f5518c7c9e936522f86c3d5951998571bd1f52538c2e6319164ec2
font_01_sfnt_off00008c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C04 18568 bytes
SHA-256: c92ffc4b0a25297e5cb072730946a0b1148bdbd55d1fb8617b3aed7a055963e9

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