Malicious PDF — malware analysis report

Static analysis result for SHA-256 a39e35f50c75820c…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 22:06:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 43ba8827cd46cbc40c49c9c85026c07b SHA-1: b051bb9405cbcb3c272c5f68e5b461192d8eaff4 SHA-256: a39e35f50c75820c5116ceffeb0b1b023f21c3a6c50b283801d84487c70a149a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure. The embedded URLs, including the primary one at https://netcdn.online/app/406889139/coin-master-free-soins-game-hack, are designed to trick users into downloading further malicious content. While no scripts were explicitly extracted, the nature of the lure and the ML classification suggest a malicious intent to exploit user interest in game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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-soins-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/earn-free-spins-for-coin-master_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005300.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5300 24384 bytes
SHA-256: 11b4068605675a5f47d9cb026f411a2ef9cf9d718d6b3566468bd8804a533b1c
font_01_sfnt_off00008ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADA 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000094c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C4 17712 bytes
SHA-256: a621fa0cf6ecf429ccb0e9762dad0d1971a2824e8730eca88621f5efe7e14995

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