Malicious PDF — malware analysis report

Static analysis result for SHA-256 1946a82ff6f639a8…

MALICIOUS

PDF

37.9 KB Created: 2021-06-21 19:36:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0fbb03b9eb5b46fef20fdb7171c90432 SHA-1: 30bf4fa8cad99d163311c6caeafb99ae39b60de2 SHA-256: 1946a82ff6f639a8f8e748b677b6080d2333d8ec6351f7849a930b3b25187b64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, specifically advertising free game hacks and currency. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lure users to malicious infrastructure. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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-only-game-hack In PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/earnrobux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/cheat-lumber-tycoon-2-roblox-rain_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/2021-btools-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C42 23008 bytes
SHA-256: f67b6443a641f5c9dcb0eb1e8faa301ea593786d8515eabb8a6aaf07f47785a4
font_01_sfnt_off00006fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC7 18972 bytes
SHA-256: 0566d487028a2c10d25b27d0905853e0e506c501f4093cc5a41c0ceac493f69b

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