Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3721ac4d258d76…

MALICIOUS

PDF

45.0 KB Created: 2021-05-10 19:02:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: eb1f5f5b8191693772e3bf8bfc2742fa SHA-1: 6b6ce87f3eebdfc3ba668704f638e3f50888307a SHA-256: 1d3721ac4d258d766865a5924869178b9696525cea0fd6ef9961d17840e9c321
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links designed to lure users into clicking on 'game hack' or 'free spins' content, likely as a SEO spam or phishing tactic. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'PDF_GAME_HACK_REDIRECT_LURE' specifically points to this type of deceptive content. The document body contains obfuscated text and URLs that lead to external sites, suggesting an attempt to redirect users to malicious pages for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-free-spins-link-2021-download-game-hack PDF link annotation
    • http://repository.poliven.ac.id//repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/roblox-adopt-me-hack_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D0 25352 bytes
SHA-256: 12f5e627cda06e26299fd1467bf96952f5ec2660fda4d34c2b5a6c780b71e456
font_01_sfnt_off00008144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF6 19036 bytes
SHA-256: e0f8480fa6793c91ec869da5acb64ee4c254eeaf21d467085c584c7dc5eb632a

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