Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b7fe2fba662b95…

MALICIOUS

PDF

44.5 KB Created: 2021-05-15 12:36:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 30e998e843f2869b435fb6235e9b87f7 SHA-1: 29c487dc4cce0421e5591513776ef41efc636974 SHA-256: 71b7fe2fba662b950d5f2e06e5b2736d460b85341142856e5d8d9eb324ae13fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free in-game currency, such as Coin Master and Roblox. These links are flagged as malicious redirectors, indicating a likely attempt to lead the user to a phishing or malware distribution site. The document body and embedded URLs strongly suggest a lure-based attack pattern designed to exploit user interest in free game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/coin-master-game-free-play-online-game-hack In PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000483f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483F 25200 bytes
SHA-256: 814a4137895bcc20b914e4d943ad6d98b7e7feebc1ea5c0c388f93d398cd519d
font_01_sfnt_off00008195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8195 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B47 18380 bytes
SHA-256: b5bbbc623ea736b659451b361c4225dcdb8ece8dfba16a3ff4312aad2e8470ed

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