Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ec809c848a962d…

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 09:41:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0f4604b35e62bdb52c4eb123f4cf9ef8 SHA-1: 6a9a53341e6e5e9da2d4f5a9c72646ae44516b14 SHA-256: f7ec809c848a962d0f27e52d553c0d02a375bdb3f27019718630e60cd57525f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' and game hacks. The document body and embedded URLs strongly suggest a phishing or scam lure designed to trick users into visiting malicious sites. 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.tw/app/431946152/i-want-free-robux-game-hack In PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-play-welcome-to-bloxburg-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-hack-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/dungeon-quest-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/robux-xyz_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/game-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/rbx-earn_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/hack-robux-hack-hack_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/moonactive-coin-master-free-spins-link_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_off00002e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5C 22704 bytes
SHA-256: c147997b8344f82337f0c47ccea26b7029944245823326ba88f65fe148548b6b
font_01_sfnt_off00006147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 19020 bytes
SHA-256: eae9f8d08779fd2c5c3bd60eb75d4d29ea8b13925606d89c315f12075b4b7800

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