Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff1204280dc7b63…

MALICIOUS

PDF

38.7 KB Created: 2021-06-27 07:54:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1dfb28f00fd68d7981b5c0d53d6ca9ea SHA-1: 5d0ae732c771cc25c3d0f4cf36eb7fd64a242468 SHA-256: fff1204280dc7b63a203fb9772366e7036996e60d580d5d12d79a8bd11641d07
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains an embedded URI and multiple other URLs, all related to obtaining free virtual currency or game hacks, suggesting a social engineering lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a malicious workflow. The primary IOC is the direct download URL, which likely leads to a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://netcdn.co/app/431946152/plz-give-me-free-robux-game-hack In PDF document text
    • https://www.cinemapalace.ro/trailer/files/pokemon-go-free-apk-download_GM1094591345.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/noto-clip-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-cool-free-avatars-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-website_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/me-han-hackearon-roblox_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-easy-generator_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/robux-download_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-hair-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-stuff-on-roblox-with-codes_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off00003cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CC4 23360 bytes
SHA-256: ecdaf11f3ae6fc59239966fb5471e7979a877d7dc8b0594f631cdff1d1c3f80d
font_01_sfnt_off0000719a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719A 19456 bytes
SHA-256: 7d6f303828e5c70812f8d8f94599b07f45f456d247133673076d5fb84fb04b74

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