Malicious PDF — malware analysis report

Static analysis result for SHA-256 465f994c8275cf05…

MALICIOUS

PDF

47.7 KB Created: 2021-06-04 02:21:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 40f4c40ce44f239f91e7a6fcb4ea9ad9 SHA-1: 4a0ad7fb1f902e6fc98cfcd34fca69853e12150c SHA-256: 465f994c8275cf059a134abc4ff63f5eee8499937a12b25414258374bb295ecc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically advertising a 'free generator / game hack'. The document body, though heavily obfuscated, contains references to these lures and the malicious URL. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/blogger-coin-master-free-spins-game-hack In PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005358.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5358 25208 bytes
SHA-256: eb6d9911e33b2f1158c6920fe0e53150378a81e8c2af64435b33601ab6565d69
font_01_sfnt_off00008d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9D 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000974f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x974F 18464 bytes
SHA-256: 0911799b9aa5b6ecf8f75e1ae71094da345a4ed5579c86b7800e8f9c3f9f610d

Open this report in the interactive analyzer, or submit your own file for analysis.