Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52779b9e61398cf…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 04:24:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9756fb0ac089c4dd0935686f0c46a889 SHA-1: 95362d973b2d69080c015c5aca3a852947beeb82 SHA-256: e52779b9e61398cf74df7344aae2fa51c34e0cfd284b739a343fa576a2046b3a
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to known malicious infrastructure, masquerading as game hacks and generators. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous redirector links indicates an attempt to lead the user to a compromised or malicious site. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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/1094591345/how-to-earn-free-pokeballs-in-pokemon-go-game-hack In PDF document text
    • http://londiniumcentre.com/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://londiniumcentre.com/images/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-spins-5-10-2021_GM406889139.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_off00004ac1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC1 24180 bytes
SHA-256: 310fc6ce5b3df739509ef86d33b57b729db61ef8b783e09d9b21467e1c9f3905
font_01_sfnt_off000081c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C9 18468 bytes
SHA-256: 29aa58d98773209e33e43df133b0e5d1d3c189c79999258d2651427151b40c01

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