Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f0684165b76b2c…

MALICIOUS

PDF

33.1 KB Created: 2021-07-04 07:49:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6f049555721bd7af94cd518f1b93aa1e SHA-1: 2a8244e25b1952ab86d7b6f92cd858c307e051e0 SHA-256: 30f0684165b76b2c638fea861869e425b6fc3601f7df386cfe95f052d4cc1008
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary redirector URL is http://netcdn.tw/app/406889139/coinmaster-spin-ml-link-game-hack. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/406889139/coinmaster-spin-ml-link-game-hack In PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/create-free-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/tiktok-free-download-windows-7_GM835599320.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-a-free-face-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-a-free-roblox-face_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/hacks-for-roblox-the-purge_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-but_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-jail-break-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-2021-free-spins_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_off00002d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D66 22052 bytes
SHA-256: 1ceed702ddf5d2d6ca4499af3074e5cfb37eb5cfb652bf64177bbce525dc31c4
font_01_sfnt_off00005e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E02 18516 bytes
SHA-256: b0e668e274ded437ed00a1d6794e4abb06f5793e6d3053ab6dfe258afb448a5e

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