Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6298fd510961d29…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 14:17:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b91b21132868043a58ca18ba24c107aa SHA-1: df46afe2a3697bd4c2272bca9895c1ff89a6eec4 SHA-256: e6298fd510961d2955ab5890b4b3c4d0233d3f4cb63fef8de520b313c2919751
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a game hack, directing users to a URL associated with malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The embedded URL is the primary indicator of malicious activity, likely leading to a phishing or malware download site.

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/406889139/300-free-spins-coin-master-game-hack In PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-pin-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-jailbreak-speed-hack-download_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-roblox-script-executor-download_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-easy-money-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-roblox-giftcards-not-used-100_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/shiny-teeth-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spins-link-haktuts_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_off00002fd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FD8 22920 bytes
SHA-256: 090be102830c2762839dad06e0735f6107a8d3ee01788bf4a1b54d1e34de8522
font_01_sfnt_off00006371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6371 18520 bytes
SHA-256: 7152d93b7e5e37e9ebec40db19215018c6c4055387bd9feb172697bbfaff0143

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