Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18336d88e8bedb5…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 11:05:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4d18643f2100dadc9bb2c099ff3b5856 SHA-1: d56db84a5420a0c999029843d7dc33200aecaa96 SHA-256: f18336d88e8bedb5933a07646b5a8396d248572c3b4b68911b17e2fbcc960120
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting these sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt, likely serving as a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-for-kids-game-hack In PDF document text
    • http://poonhilltreks.com/userfiles/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/daily-spin_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/get-free-robux_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://poonhilltreks.com/userfiles/files/do-you-get-minecraft-windows-10-for-free_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
stream_003_off00004ae1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE1 24920 bytes
SHA-256: 89b7d4bac5706aa4b98700a894f40236101eb2b4a8a4a03bc44612e96d398dc7
font_01_sfnt_off000083af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AF 18308 bytes
SHA-256: 763c1f2cd60606b291f89f2a80f52d083a3bf80be883c0f2186ef0e0ffb8dff5

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