Malicious PDF — malware analysis report

Static analysis result for SHA-256 4251623990f35432…

MALICIOUS

PDF

34.9 KB Created: 2021-07-08 12:35:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b76607ece87f798069bebd05d713faf4 SHA-1: 62c44de5f892a48b1d69e8101c060d52bfc6717f SHA-256: 4251623990f354325e479b6940f95eb398bd6d6f048b1d38a32fb9e3f8fc27a4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a high-confidence heuristic identifying a 'game hack' redirect lure. The document body, though partially garbled, also contains URLs and references to game hacks, suggesting a social engineering tactic to drive traffic to potentially malicious sites. No scripts were extracted, but the presence of embedded URLs and the 'game hack' lure strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-twitter-game-hack PDF link annotation
    • http://lib3tell.stptrisakti.net/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-100-always-working-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-spins-promo-code_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003271.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3271 23112 bytes
SHA-256: fa4603c05a000e17ca043c09e3619a7046688d0125cb938c6e927f343eb45d18
font_01_sfnt_off0000662e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662E 18168 bytes
SHA-256: ddfa55fb21221439d64b6917fef2d932236e956379e28e7db94b80a6554a2b49

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