Malicious PDF — malware analysis report

Static analysis result for SHA-256 8998a9707a567692…

MALICIOUS

PDF

45.3 KB Created: 2021-06-04 03:17:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e7088f71d22b40d1afe5d3d3b2fdbacb SHA-1: d1b8547f504215af9afb16446fd4f43f24e9af6c SHA-256: 8998a9707a5676927f6f92894eb75be65f399717f16c6cad29c7503c0654d157
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The ML classifier also flagged this document as malicious. The embedded URLs and the heuristic firings strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/windows-10-minecraft-free-with-java-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/a-lot-of-robux_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_off00005334.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5334 25336 bytes
SHA-256: f60fa6ac6d3848b32a17576f7bfb2330e37f9800cae4224e14373df017984148
font_01_sfnt_off00008c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C79 18972 bytes
SHA-256: 9d6b9c54d2a131b4fb739230225618891bd38f691818b7a412f84340786b5520

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