Malicious PDF — malware analysis report

Static analysis result for SHA-256 e970c6cec2b1044d…

MALICIOUS

PDF

43.7 KB Created: 2021-06-09 12:32:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 70fee751eae8aace140b3b1d54d02d63 SHA-1: d29450431a94429e39f765612612b804e92dcacd SHA-256: e970c6cec2b1044dd9b4629a4ccb87bf988a1165a3ee07cf9c2887b20ae37e87
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure and known malicious domains, disguised as offers for free game currency or hacks. The heuristic firings indicate that these links are designed to lure users into clicking, likely leading to a phishing page or a malware download. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/free-robux-100-true-game-hack In PDF document text
    • http://jjpremiers.com/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/cm-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-hack-into-robux-database_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-make-custom-api-for-roblox-hack_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_004_off00004e12.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E12 25316 bytes
SHA-256: a40acca0f14610170a4c3d70e053f15c7e952675e6f9336869038a08fb94e47d
font_01_sfnt_off00008843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8843 18292 bytes
SHA-256: 31a28b6dfee0097ac513a83340ef72c7822acf3f47bc415d9bb17db4ecd9a37f

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