Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6a56cbdfc4f08a…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 16:01:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f60c5f4c2cb4d7f474966cb857441d88 SHA-1: 1dedc34f1aba6ace1861e124aaca8182a5c97b0f SHA-256: eb6a56cbdfc4f08a541582e551d1e542917ac2eb4462588db5204afde8e7df31
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/479516143/minecraft-free-apk-download-016-0-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-free-apk-download-016-0-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/problox-icu-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-really-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/bux-gg-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-bc-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-hack-deutsch-handy_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-talk-to-roblox-if-you-get-hacked_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/win-free-robux-robux-robux-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-gucci-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/hack-money-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-spin-free_GM406889139.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
font_00_sfnt_off00002e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5A 21768 bytes
SHA-256: 4377b0c10ee398a754a28e7ce921926bc613dbb5c8d3442ffa925a13fbae545a
font_01_sfnt_off00005e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E12 19372 bytes
SHA-256: ad1c8416b40d232990ebb25cde03910f86673b264f42f006c1556a603f1888c8

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