Malicious PDF — malware analysis report

Static analysis result for SHA-256 4343afaeed6cd5c6…

MALICIOUS

PDF

42.7 KB Created: 2021-06-03 12:55:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0445c1e97fc201606c4ea70b0c374b5a SHA-1: 4c12187816ee3cecab56089176b5223a916d8d13 SHA-256: 4343afaeed6cd5c63cf2ab1f06a35f671a908cead5428e6970e1bc2e85214fae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. The primary malicious URL identified is https://netcdn.online/app/406889139/hack-coin-master-no-survey-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs suggest a phishing or scam campaign related to popular games like Coin Master and Roblox. No scripts were extracted, but the presence of multiple malicious links indicates a high likelihood of redirecting users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/hack-coin-master-no-survey-game-hack In PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/hack-a-game_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/robux-gift-card-free_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_off00004d11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D11 24216 bytes
SHA-256: ef3692011c41743274c92f81737e4442d9ae44e5d8d11b0501627f548db7d9e8
font_01_sfnt_off00008484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8484 18148 bytes
SHA-256: e84df6580521eb153faf73f2cf2f63c6185ac0436430677c3eaeca27c8c111a1

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