Malicious PDF — malware analysis report

Static analysis result for SHA-256 299a9ec5160e2a83…

MALICIOUS

PDF

33.1 KB Created: 2021-06-29 13:50:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 47ee808f06c94b3bc0141a1be821f51b SHA-1: 6cefb74ad4a24f404d7c0523e5630b1ed789e756 SHA-256: 299a9ec5160e2a832016f3c1653847232e874bc3994131072e77b6370b2c8f80
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free game hacks' for popular games like Roblox and Coin Master. The document body includes a call to action to access a 'ROBUX GENERATOR', further reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/roblox-aesthetic-outfits-free-game-hack In PDF document text
    • https://www.cow-style.com.tw/upload/files/free-download-roblox-for-windows-7-32-bit_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-make-a-cool-roblox-character-free_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-hack-week-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-maps-wwii-realistic-roblox_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-hacks-giveaways_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-online-hack-for-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABA 22360 bytes
SHA-256: dd9b6e0728166358dac82a7ed99689bca74403b865a1b7b551149f7dae3e27d1
font_01_sfnt_off00005c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C40 19180 bytes
SHA-256: dc32fefd04d5141876aaf034b9193337fc16608fe390cfae6684ca3f78413400

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