Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36faa80972b68bc…

MALICIOUS

PDF

35.7 KB Created: 2021-05-20 22:21:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 66bd2dfb682794e07966bd6af80b3558 SHA-1: 192cfb2e6daec09e47cdf2513ce38f9d0e38dc29 SHA-256: a36faa80972b68bc4737edb6927509bf110d6ac5a8f207de7db3517ea65c80bc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators. The document body and heuristics indicate a lure to click these links, likely leading to further malicious content or downloads. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/431946152/play-roblox-free-online-game-hack In PDF document text
    • http://rainbowbuddha.academy/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/get-free-spins-on-coin-master-no-human-verification_GM406889139.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_002_off000030f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30F0 24604 bytes
SHA-256: 06f899a322be9ad5fec6e437e460262661aba3c0f2a076f676b0316dac7b9d69
font_01_sfnt_off0000693d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693D 18628 bytes
SHA-256: 0face4c994977258c5b75d4e8d8705768a4ec09c316ae5d82e3d2938a44d0e6e

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