Malicious PDF — malware analysis report

Static analysis result for SHA-256 38aa2116849778f4…

MALICIOUS

PDF

44.0 KB Created: 2021-06-04 06:03:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 69caa989f1f0ed07050b8804b89557fc SHA-1: c5a85c290efd92acdb1ea2b23334e40a3097de92 SHA-256: 38aa2116849778f4687a9374f3f492888a4eda5ddc3c15919f72a99055301bf8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, that lure users with promises of game hacks and free spins. The primary malicious URL is https://netcdn.online/app/406889139/collect-free-spins-for-coin-master-game-hack, which is designed to lead users to potentially harmful content. The document body and embedded URLs reinforce this lure, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/collect-free-spins-for-coin-master-game-hack In PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-hacks-teleport_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.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_004_off0000523b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x523B 24604 bytes
SHA-256: e06cfb873c60fe20d6f937ec2cf2fe30edcc1548030d61309e00f51944c48fa6
font_01_sfnt_off00008a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8C 17960 bytes
SHA-256: 56908844ab102c912342fec259dbf5a97100868d5d877c05497f82053eb67f28

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