Malicious PDF — malware analysis report

Static analysis result for SHA-256 2addb4e0984ebb55…

MALICIOUS

PDF

44.3 KB Created: 2021-05-10 22:10:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5fb9e577640289a9621ce84528ed5a44 SHA-1: 1bdfa136e71c30e6b07fb56e0293c60ccf6f0b1e SHA-256: 2addb4e0984ebb55b7d19a748d74f0746fc181a8a9c1e51f6d517fca3116540d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on "free generator / game hack" content. These links redirect to malicious infrastructure, specifically the URL https://netcdn.xyz/app/406889139/cm-spin-link-game-hack, which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/cm-spin-link-game-hack In PDF document text
    • http://lc.pustaka.unand.ac.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-giveaway-live_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_003_off000049b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B2 25096 bytes
SHA-256: 9459a32a663c65df808d093e2b0ed5641647416b8c6b1bc5c3ce151ef036f667
font_01_sfnt_off0000827a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827A 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C94 17676 bytes
SHA-256: f953d4866123818d5866b37da748df1449ada45748e72b979b6621785a81e92a

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