Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efe5d54ce11d61f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 21:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ff28b13e17dd769b4dbca246b84e4a70 SHA-1: f980c2abe26024fcfe8c479895715af7b62b1280 SHA-256: 8efe5d54ce11d61f545dbc9a343a7fe00139e0dbf68df2eadd63aa506085a3e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirectors and potentially malicious files, disguised as generators for popular games. The heuristic firings indicate a malicious redirector and a lure for game hacks. The embedded URLs likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/406889139/coin-master-card-hack-2021-game-hack In PDF document text
    • https://domc.tw/upload/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/add-robux_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-roblox-gear-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-roblox-accounts-with-obc-and-robux_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/irobux-fun-roblox-online-hack_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-get-free-robux-100-legit-no-human-verification_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-exploits-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-random-robux-codes_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/free-tix-and-robux-game_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/rxgate-cf-free-robux-redeem-code_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-roblox-dungeon-quest-account_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/roblox-jailbreak-speed-hack-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-roblox-app_GM431946152.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_off00002ece.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2ECE 22980 bytes
SHA-256: 91bf1fd243bb8c886e1d4c63c609b38376568277550d2e1c0cf1bb36e7082486
font_01_sfnt_off0000626e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 18580 bytes
SHA-256: 47e303c72cd5b62bb17ad4e651525e7015df29692984bfa1ae4c9035b919f2a0

Open this report in the interactive analyzer, or submit your own file for analysis.