Malicious PDF — malware analysis report

Static analysis result for SHA-256 e668d01dc2307734…

MALICIOUS

PDF

35.9 KB Created: 2021-06-18 02:28:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 64acd767fcb45258b1eb2e885381ce5f SHA-1: ac21523a1363cfbf87bc4161b333ae75ee284439 SHA-256: e668d01dc2307734793096c635c4d6713b9de31e2625c7d96c8cd9a34a2477c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising free game hacks and currency. The document body and heuristic firings confirm the intent to lure users to these sites, which likely serve as a gateway to further malicious content or phishing pages. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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/free-robux-without-app-download-game-hack In PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-royale-high-dimond-hack_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/unlimited-robux_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/robux-hack-com_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/e-free-roblox_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-promo-code-to-get-free-robux_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_002_off000033d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D5 22052 bytes
SHA-256: 62e22728b3ba61539d720774ce99a4dda29c7d2f3d72c5599f5a6d1ddb00a797
font_01_sfnt_off000064dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DC 19876 bytes
SHA-256: 89f23191798c880a98f2053c210344233fae52d7a739c5eb41b09fcd07cd6269

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