Malicious PDF — malware analysis report

Static analysis result for SHA-256 577c464de22c9da2…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 08:07:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d8a09846eb762ecb6cb0f0601773faa7 SHA-1: ad2cf6570ca91f1b012372646db168868ea5faff SHA-256: 577c464de22c9da2035e950ef37d3dd281eb9e30a41644449be1c9c2ee81e0b9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' or 'hacks' for popular games. The primary redirect URL is https://netcdn.online/app/406889139/free-coin-master-hacks-no-verification-game-hack. This indicates a social engineering lure to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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.online/app/406889139/free-coin-master-hacks-no-verification-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pubg-74-uc_GM1330123889.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-coins-apk_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ab0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB0 24536 bytes
SHA-256: 2ca7148ae58aabe6ce18b7e326c6073628cc92934f064b5c7069f33213edee0a
font_01_sfnt_off0000814c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814C 2868 bytes
SHA-256: 00109425b76763440a5569341faade0445b3c9f8514523a6f287fddbc9082efe
font_02_sfnt_off00008b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B39 18016 bytes
SHA-256: 22df04c4dacbc852f4ecaf83adb1826ed6293343c5161e377e09b669fc2092ee

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