Malicious PDF — malware analysis report

Static analysis result for SHA-256 df87e1c998704e06…

MALICIOUS

PDF

47.0 KB Created: 2021-06-04 03:58:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0db71aea970cbe7074a78f9ff6795669 SHA-1: 6fceb36afe08649d74101e42cf68a2723a25a165 SHA-256: df87e1c998704e064370b2a8b5cbd42ecd8675679105bd70692d0c3d93cb20a9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for linking to a 'game hack' lure, specifically targeting Coin Master players. The embedded URL and numerous other URLs point to sites offering game cheats or free spins, which are common pretexts for phishing or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • 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.online/app/406889139/coin-master-free-spin-codes-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pubg-uc-official-price_GM1330123889.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-converter_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/is-minecraft-free-on-mac_GM479516143.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_004_off000053e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E2 24644 bytes
SHA-256: 468b1936e2ce13377ee2e4e6af5522010581ceb8cb9dc245ac0773627c0c82f3
font_01_sfnt_off00008b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B80 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off0000956b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x956B 18060 bytes
SHA-256: 6c6954b9f81c735a5c4580de4c42457a99792272849cec4d30b191d18cdb5601

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