Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f4b31f5d7044da1…

MALICIOUS

PDF

44.2 KB Created: 2021-05-14 07:54:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5b7de32389328c5af0d9875f8b8c95cb SHA-1: 7312590153539337d7b5d93e87b9d7157fcd6fd7 SHA-256: 1f4b31f5d7044da1d529fd60e186bf1dc9e17ba05d43ac03b1dcfced8482b1ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/431946152/is-there-any-way-to-get-free-robux-game-hack. The document body and embedded links suggest a social engineering tactic to trick users into visiting these malicious sites, likely for phishing or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/is-there-any-way-to-get-free-robux-game-hack In PDF document text
    • http://poonhilltreks.com/userfiles/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/robux-today_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_003_off00004a24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A24 26840 bytes
SHA-256: d1b704481b8bfe91de97755de56a271af6a4d456b9d9856c4fa269ea2df4573f
font_01_sfnt_off0000888f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888F 18892 bytes
SHA-256: d4b621edf5ac5f073c5a65dd804db4f1f2ad13c123c1b5ace541ce5f5c284f58

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