Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4988fc74996bbf…

MALICIOUS

PDF

28.4 KB Created: 2021-05-15 00:38:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fe43afa7fc39c0370e9480bb7db305ab SHA-1: 2d9df8ba486e18aace0c2b36f9f594bd83dbfe28 SHA-256: bc4988fc74996bbfcbba157fa03a143a6a555abd087d5e6a678169c91f0b6c07
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically targeting users with lures related to game hacks and free generators. The ML classifier strongly indicates maliciousness, and the document body contains multiple URLs pointing to potentially harmful content. Although no scripts were explicitly extracted, the nature of the embedded links suggests an intent to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 3

  • 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.
  • 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/406889139/coin-master-daily-free-link-game-hack In PDF document text
    • http://londiniumcentre.com/images/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://londiniumcentre.com/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/hack-minecraft_GM479516143.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000494c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494C 16459 bytes
SHA-256: 2d4f62e1eced7c70c5af55cd1e5915051337d48461489ded5fbc616d1634d9c6

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