Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ec255923fbeeac…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 23:50:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2ec90ef660628c64e1196c004cbc0db1 SHA-1: 274ae2628d5751274dc6b6c5388eeb0b03ac795d SHA-256: b5ec255923fbeeac3825157086ce8ea32a76409177323f2af93980b7e4292feb
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 0.9980

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-free-spins-and-coins-today-gift-reward-game-hack PDF link annotation
    • http://stitqi.ac.id/website/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/pokemon-go-free-team-medallion_GM1094591345.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-disney-plus-accounts-tiktok_GM835599320.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_off00003034.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3034 22832 bytes
SHA-256: 11e27bdc0f675edc72b186dd59ab7893ddcd59ba99d2f5040b6774a128318733
font_01_sfnt_off000062f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F0 18692 bytes
SHA-256: d31088ae19f241ea86c3227f133fc8e6698cecaa627da06b5b2cde690df300ac

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