Malicious PDF — malware analysis report

Static analysis result for SHA-256 547e026a8205a5d1…

MALICIOUS

PDF

41.2 KB Created: 2021-04-29 13:17:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 590488347b9bc067d69626167eaa05af SHA-1: 52830e5185d212f46ab8579abc220c783cf0188b SHA-256: 547e026a8205a5d1af42490e298dacfc94d2a89c6d333e567e2ca08166dfa458
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one that redirects to malicious infrastructure associated with game hacks and generators. The presence of these links, combined with the ML classifier flagging the document as malicious, indicates a social engineering attempt to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/how-to-hack-roblox-with-hackbar-game-hack In PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-colouring-in-pages-free.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/promo-codes-for-free-robux-on-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/best-free-items-in-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-bc-in-roblox-pastebin.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-galaxy-wyrm-still-free.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-free-account-dump.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-hack-bee-swarm-simulator.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-robux-that-actually-works.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/ant-free-robux.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/cheat-engine-keeps-getting-me-kicked-roblox.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_003_off00004066.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4066 26184 bytes
SHA-256: aaa88c59e8282e68039f01b72c6c75600730206a0609fcb54ea2bce8778b58f4
font_01_sfnt_off00007d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3A 18932 bytes
SHA-256: e8ae47343b209b796ed119989716855f7cc1d1497cd0d4c39cb46f90be646f50