Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab014560ef23909a…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 22:46:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9adae5a5831205e50d6edf915d8fd71d SHA-1: d22af350c501d4d670c806f75d89eaf8495c862d SHA-256: ab014560ef23909ab0ba9194813fa87342c1e7d2aa5d4547496fceae2aa16895
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 0.9980

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-extension-game-hack PDF link annotation
    • http://lib.uho.ac.id/library//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/pubg-700-uc_GM1330123889.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/pokemon-go-free-coins-apk_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-accocunt_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-free-7k-eggs_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-free-kanto-ticket_GM1094591345.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_002_off000030fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30FB 23296 bytes
SHA-256: 9902701f5a61dfd9f9cffe7a021cbfda1bd62a5822f7b0bfa1bbf9bf2450a641
font_01_sfnt_off00006591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6591 18216 bytes
SHA-256: 2931dff1aa1ed3e5abaa74da1b228119697b7db9f330ff004e5f50cd24bc59fb

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