Malicious PDF — malware analysis report

Static analysis result for SHA-256 355122a36f92e51a…

MALICIOUS

PDF

32.8 KB Created: 2021-06-30 11:27:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bd417b6fec0339e36fb5b4692b446929 SHA-1: b63628da487b989a321134c0b5ad4e07cf5492fd SHA-256: 355122a36f92e51af23ffa9bfe570c88eb90f85867e60f398af886c79b85658e
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 trick users into clicking malicious links. The primary link directs to a known malicious redirector, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a malicious workflow designed to lead the user to potentially harmful content or further malware downloads.

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/free-robux-batu-kol-faki-game-hack In PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-hack-noclip-speed-hack-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-hacks-v65-free-no-downoald_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/hack-robux-2021-free_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/pubg-uc-or-ag_GM1330123889.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/unpatchable-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00002a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A41 22088 bytes
SHA-256: 82efa4665e04b1c4ce67b4e2cddfec691d8eb9c3e8e475c56cb96786b68f7f1e
font_01_sfnt_off00005b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0A 19184 bytes
SHA-256: 46043ef7746c84e9d89e35c84bdafaa5a627d2f22e4f71800eb4eb05c9c27337

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