Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ce83dc1ee28e5e…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 00:56:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e1e87ad9b2076b15c2b2afc1f36a5acb SHA-1: 0ac31348533bd7b2168b2246dc9485488447661f SHA-256: b9ce83dc1ee28e5e8607d72e0a3d9d63ec06c09dce40cc76cd307081949dac46
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 generators. The primary lure is a link to 'how-to-get-free-unlimited-coins-in-coin-master-game-hack', which is hosted on known malicious redirector domains. The document's content and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

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.tw/app/406889139/how-to-get-free-unlimited-coins-in-coin-master-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/script-roblox-hack-2021-notepad-script-pack_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-high-school-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-para-roblox-jailbreak-cheeskoo_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-no-survery_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-hack-roblox-on-youtube-on-your-phone_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-cards-free-cards_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_002_off00003176.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3176 23104 bytes
SHA-256: 5e65f32f7ead684b287ca57496e43753b4cf560733f1cfe6c2c11c26b61e2022
font_01_sfnt_off00006566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 18856 bytes
SHA-256: 2dd3f63cd5448f5fbece3b23266543376f477af7a872319e7351590eba77ed0d

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