Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f3a46b23022be4…

MALICIOUS

PDF

41.2 KB Created: 2021-05-10 18:37:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6a818c3cd4c0e38197b84b3a0df1b385 SHA-1: 283e2765b4d03abcfe3c1a6600ba593c3abaeac4 SHA-256: a5f3a46b23022be491169b6d73a5d7babc717e9a17012bf8c5cb7b439e1e2c99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, specifically advertising "game hacks" and "free generators" to lure users. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or scam attempt designed to redirect users to potentially harmful content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/daily-coin-master-link-game-hack In PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/minecraft-java-edition-free-download-for-android_GM479516143.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_003_off000049ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EC 23508 bytes
SHA-256: 4f3fbee0a61d8aae76697c2ce6057317c290dc5f18e6839557202ab9cbeb2dbb
font_01_sfnt_off00007f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F00 18136 bytes
SHA-256: 982ad4b1f6b69cb91937238f9970daf2e783e2300abd9bcc91da09ddfa737630

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