Malicious PDF — malware analysis report

Static analysis result for SHA-256 64849b6e538543b3…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 10:13:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 63f5c6a5215f59bd00b562719a2751c1 SHA-1: a8d6d18770b39c4a67dc2d4a2c5624e06fe6fc9f SHA-256: 64849b6e538543b31aa63454c4cfc2772687c11814cf31c40a93781f7e00396d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body and embedded URLs reinforce this theme, suggesting the primary goal is to trick users into visiting these sites, which likely host further malicious content or phishing pages. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a social engineering attack.

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/free-spin-card-exchange-coin-master-game-hack In PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/roblox-how-to-get-groups-for-free-and-make-robux_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/hack-de-roblox-para-volar_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-to-get-20210-robux-for-free_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3223 22564 bytes
SHA-256: f4f6f2c79116b1a9f357efd8f1dc68191c537f6fe62a96fa8582c2319424b09a
font_01_sfnt_off00006491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6491 18724 bytes
SHA-256: e2efc63832e3f3d0cc27554cd175031d6dce372ee88d83af1c1db3c8b92a73f2

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