Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f5d21684bbe91b…

MALICIOUS

PDF

45.6 KB Created: 2021-05-11 21:11:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5810c7395f58bed83b089762e4a72ffd SHA-1: 0bbdacac12de132058e4fc87b68993646d099375 SHA-256: 89f5d21684bbe91bb406024fcd359afd6fb017583749aa02781cad5515358858
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body, though heavily obfuscated, contains references to game hacks and includes multiple URLs that likely serve as landing pages for malicious content or further downloads. No scripts were extracted, but the presence of embedded URLs and the lure suggest a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/free-spins-coin-master-app-game-hack PDF link annotation
    • http://subarulegacy.com/images/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://subarulegacy.com/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://subarulegacy.com/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/youtube-how-to-get-free-robux_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_off000047ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CE 28748 bytes
SHA-256: 62f70f93ad6a7cf159f6ea1af0121201e5ae4571898a814ddcd4a1486c63bb43
font_01_sfnt_off000086d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D7 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000090c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C2 17884 bytes
SHA-256: ed1ea3c4e7635b9f65a5e0b6798c92341d7c1feababf17669f4466b6be8364ea

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