Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d38d8f3a7dc03a…

MALICIOUS

PDF

42.0 KB Created: 2021-05-12 19:04:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bc8d45e8810e2ca286e5ad414c554766 SHA-1: 6752346952a0bef042ead0fb4be591283ba2b855 SHA-256: d2d38d8f3a7dc03a2e25abb04979d475ae37fd8d0e59da3b76a6984750522f81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically designed to lure users with promises of game hacks and free in-game currency. The primary URL identified, 'https://netcdn.xyz/app/406889139/get-free-spins-coin-master-link-game-hack', is flagged as malicious infrastructure. The document body, though partially corrupted, contains similar lure text and the same malicious URL, reinforcing the phishing and redirection intent.

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/get-free-spins-coin-master-link-game-hack In PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-hack-apk-ios-download_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_off00004920.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4920 25564 bytes
SHA-256: 67fa6631222d4d98dc60b35311ff95cd4579708b8c1f52ef9e7679a310117868
font_01_sfnt_off0000827d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827D 18056 bytes
SHA-256: ab85056fbf29cd03dcfab7de7beb0343ed26656e2e8858e8ad52cb7aa31a5a92

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