Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad37272f5792dc71…

MALICIOUS

PDF

32.9 KB Created: 2021-06-30 01:44:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3f6f6386e516b6f55b35ae23d54954dd SHA-1: a672e47ab7ea999e8e3c6890238344cbec4bd264 SHA-256: ad37272f5792dc71770f3434e18ce9fb164e697b57e56a2d38243954284fb5ab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to entice users into clicking embedded links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or exploits. The document body and heuristics strongly indicate a social engineering tactic aimed at tricking users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/robux-obby-that-acyualy-give-free-robux-game-hack In PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-buy-anything-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-roblox-hack-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-hack-cash-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-hack-free-robux-download_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-free-pets_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/claim-your-free-roblox-game_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-free-gift_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off00002a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A77 21936 bytes
SHA-256: fc49af182feacbd0af0b687b4a2f371e2a13d8a043e8c1d02b0ce3b0b54175eb
font_01_sfnt_off00005ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC0 19476 bytes
SHA-256: b235f41f880c4e3aeff54c5dbf7cd2d60d93fad868b80bf08af4cbba9550b8f2

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