Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f501cde2d2f950…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 12:17:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4463c12fae7ac759a98da6fb6d73c8b4 SHA-1: 8eec8a658f50bbe77410113ac133b06d7e095ff1 SHA-256: b0f501cde2d2f950b2fdf9cfa0f8d19beed57d0ec258f8507668feac44360238
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The primary lure is a link to 'coin-master-free-gold-cards-link-2021ee-spins-game-hack' hosted on 'netcdn.online'. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to exploit user interest in free in-game items to redirect them to potentially harmful sites, likely for further malware delivery or phishing.

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.online/app/406889139/coin-master-free-gold-cards-link-2021ee-spins-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-rules_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-devil_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/25-free-spins-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_004_off00004ec4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EC4 25108 bytes
SHA-256: e1a7fbbb30e3f02dd46481eadff618e15ed2fa474107ba2ea8e36db06009f6d5
font_01_sfnt_off000087dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DC 18704 bytes
SHA-256: 057d9e4465c0f66289992e5f52dbd0f00041b076c8faaa7426171c2d0eea7a20

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