Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f4bb48524bb4d5d…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 23:38:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a66eca17af2e70140e0d71b0953ec178 SHA-1: 0998d7a642a25b8e94e06076faa638656c6e9c15 SHA-256: 4f4bb48524bb4d5d662ea10392a3059bd0270dbcef9d8e1a070bffe26e857c37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically `https://netcdn.xyz/app/406889139/free-spins-coin-master-links-2021-game-hack`. The document body and heuristics indicate a lure for game hacks and free resources, which is a common social engineering tactic. The presence of multiple redirector links suggests an attempt to lead the user to a malicious website, likely for further exploitation or malware delivery.

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/406889139/free-spins-coin-master-links-2021-game-hack In PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ae0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE0 24452 bytes
SHA-256: e646c7498a058fe5c9ccb1a9af990d371cc988dda7c454de0e4f1f64d7d63fb7
font_01_sfnt_off000082de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DE 18456 bytes
SHA-256: c809cb62993c96a2792eb05fd7593de41ec7ce02e3f179f2cd9cbcb899f0cf70

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