Malicious PDF — malware analysis report

Static analysis result for SHA-256 4923483cb807bc14…

MALICIOUS

PDF

47.7 KB Created: 2021-05-19 06:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2a4d203baee81e010300490ae99915ac SHA-1: cc39ee79c3f0c7c6d3f04a4a88763baada307040 SHA-256: 4923483cb807bc1464da6b9278caeae45d6e0d17a2a9562bfae83c94409253ad
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.xyz/app/406889139/get-free-spins-for-coin-master-game-hack PDF link annotation
    • http://cristalysoptic.com/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://cristalysoptic.com/images/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/pokemon-go-free-gift_GM1094591345.pdfIn PDF document text
    • http://cristalysoptic.com/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-game-pack-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_003_off000049f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F0 30180 bytes
SHA-256: b1e93750252324aab96b049fc8ea72028c4a82a86e7954bd97c6be24c9e59dd2
font_01_sfnt_off00008742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8742 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off0000995a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x995A 17884 bytes
SHA-256: 9bf67b2ee87cdcf37b0aaa2d40e70a5836dac1840b9be614bff5a3f1a0edfaa7

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