Malicious PDF — malware analysis report

Static analysis result for SHA-256 762b734dc4f303c2…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 11:38:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 426d6f468eda5d9be3d2e057d7aa1809 SHA-1: 14ee6a549e35b73a14466ffcf2386bf8b9f68cf1 SHA-256: 762b734dc4f303c2896815c35c5f6e26af1952bf86959ec9ee25f9a4794b7869
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting free game currency or hacks. The primary malicious URL identified is https://netcdn.online/app/406889139/free-spin-codes-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering lure designed to drive users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/free-spin-codes-coin-master-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/app-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-that-actually-works-no-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-coins-and-spins-in-coin-master_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
stream_004_off000052cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52CF 24276 bytes
SHA-256: 59254e482ff983f8d7b160bf001c4568abb46a80aebdba3db880ec9983553fb8
font_01_sfnt_off00008a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A80 18060 bytes
SHA-256: 2136a1c0602e46c8a246992dca7dcdebcaf9a61ffc19b327be6d600db2c61793

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