Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d749604cd69444…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 09:06:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e3a4edb4c76857ee645aac29e1316e3d SHA-1: 095d420d7bde8302456dfe0ff99b19f134a8ccbd SHA-256: 38d749604cd69444842e690674524a775e02b04c350b3bf5a892ac7a6a795397
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/how-do-you-download-minecraft-for-free-game-hack. This link is presented as a lure for free game hacks, indicating a social engineering tactic to drive users to malicious content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/479516143/how-do-you-download-minecraft-for-free-game-hack In PDF document text
    • https://knj.com.tw/image/data/files/apoculopse-rising-roblox-hack-script-spawning_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/original-roblox_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/how-to-download-roblox-on-pc-for-free_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/how-to-backdoor-hacking-roblox-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/acount-info-for-roblox-hack-with-robux_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/how-to-hack-models-on-roblox_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-robux-and-bc_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-robux-net-au-net_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
font_00_sfnt_off00003161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3161 22624 bytes
SHA-256: 608083df4983f0036e89e9e32f7e637c5647bcddd986749a79466eb8a8b387ef
font_01_sfnt_off00006338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6338 18880 bytes
SHA-256: ae8a28a4719fe920465bfa101b0c55ce4e50a49314e3e01958f41ab81cd87400

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