Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ddafdcfb8f6d11…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 07:35:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b63032db1176b7bedc2fcdc5a0f67cbe SHA-1: cd7ecb7c654e23ef058bd186a44c55b089af8949 SHA-256: 97ddafdcfb8f6d11092491a8baa6a31fda34cf6fd1751840d9d67da3243923ff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9864

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/how-to-duplicate-coin-master-spin-hack-game-hack PDF link annotation
    • http://elibrary.smknesbu.sch.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005432.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5432 26068 bytes
SHA-256: 9fcbd52e51408bcf0df47ea7bbc8edba5ab6fb20196c402bda28b2827a3bce90
font_01_sfnt_off0000905a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905A 18436 bytes
SHA-256: 63f0f1c978d8f92ee707179f18d26c907503c05d135115955c3f0d9e37ea33fa

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