Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd708074dc73637…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 02:48:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9b5a6ae57eabfe54086364f72e32ef57 SHA-1: 3422db7c3c45684236903c6aaa30e8ac9fc420d8 SHA-256: 5fd708074dc73637e003b22fc5c875f6bf672818905ae76c3285d48e4efdb713
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, including one explicitly identified as a 'free generator / game hack' lure. The document body and embedded URLs suggest a social engineering attempt to trick users into downloading potentially unwanted or malicious software. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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.co/app/431946152/roblox-xray-hack-download-game-hack In PDF document text
    • https://wald-match.com.tw/upload/files/tiktok-free-on-google_GM835599320.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/roblox-font-free_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/tiktok-free-generator_GM835599320.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/boku-no-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/admin-dll-hack-roblox_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-get-build-tools-on-roblox-cheating-2021_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/play-games-for-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/inject-hack-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/prooving-that-how-to-get-free-cloths-e-free-roblox_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-roblox-anime-free-shirts_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/no-human-verification_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/hacked-roblox-game_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_off00003073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3073 22596 bytes
SHA-256: 7ac6ebef6ed2d5fa25a6800b4be71338ba1651fd5b1fa71a3571743eb1e24e53
font_01_sfnt_off0000633e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633E 19344 bytes
SHA-256: 40a81e3341a43d4dc859b6b916aac8f4af773a20f025e48070ccdeb8c9cba3a4

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