Malicious PDF — malware analysis report

Static analysis result for SHA-256 55736817d84c11a2…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 10:48:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 81f2c530cad372e9788fed352bb3ad84 SHA-1: e417f36b8b69bc8fd4f559f5e33fcac5fc4ba0b4 SHA-256: 55736817d84c11a2dcd7c7067592a4ee2c7348e1fb97ac2e4d8ddc90c7bbd445
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and generators, directing users to a known malicious redirector. The redirector, in turn, serves further PDF files, suggesting a multi-stage download or phishing campaign. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful content or further malware.

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/431946152/robuxmatchcon-game-hack In PDF document text
    • https://tnupacktour.com.tw/image/data/files/getrobux-ninja_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/robloxcom-free-kkk_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/easy-robux-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/roblox-player-download-2021-free_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-hack-someones-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/safe-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/sign-up-for-free-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/mcpe-116_GM479516143.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/pokemon-go-free-zapdos_GM1094591345.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coins-master-hack_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/hack-roblox-jailbreak-auto-arest_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/minecraft-bedrock-free-download_GM479516143.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
font_00_sfnt_off00002ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC0 22484 bytes
SHA-256: 2fc2c264202a2bba18bd6abc4cbc711f122cefe3f4488b79c7a3298cff502972
font_01_sfnt_off000060d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 19084 bytes
SHA-256: 22fb853357d700a883506443e03244379ebe89dfe763389f41fb0df375e68649

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