Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd2a6d738d76684…

MALICIOUS

PDF

43.0 KB Created: 2021-06-03 13:56:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e14a27d6172f430dffc2fcfac9f9446d SHA-1: e269455fdc95d6a741e34974dc2529fe721d7d0f SHA-256: cfd2a6d738d766847a61317e253f7845d9fb2b10e6104d6616a10516e6b23c3f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as free game hacks or generators. The document body and embedded URLs strongly suggest a lure to trick users into visiting these sites, likely for further malware delivery or phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/479516143/free-minecraft-maps-game-hack In PDF document text
    • http://librarysenior.com/repository/how-to-get-a-free-pokemon-go-account_GM1094591345.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-hack-generator_GM431946152.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_off000050eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50EB 24400 bytes
SHA-256: 810c16551e8a49fb8e9aad07476763be724acaa0f2ff77e187948654050423c7
font_01_sfnt_off00008727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8727 17744 bytes
SHA-256: 642e76b92f67015eb87e7bb2f8978493590a3d76ebc6958dd5b149369a6bd5f2

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