Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90cc519ac937c6c…

MALICIOUS

PDF

48.3 KB Created: 2021-06-03 09:04:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c1776d5ef4755939fa8d9af38eb73c37 SHA-1: 0943d901c7b88cfc7a75226982792c48f7a0a657 SHA-256: a90cc519ac937c6c72b41beaaebc7e0fd4ee07e10872a58aca48f7ac1d69c3d0
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 0.9871

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/431946152/free-robux-on-ipad-game-hack PDF link annotation
    • http://www.donjastubica.hr/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-monster_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/mcpe-client_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_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_004_off00004f74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F74 32768 bytes
SHA-256: c92ecec0ae5e5696f0d5949d78f861478d8e9567a572863035a4a4693f8e6982
font_01_sfnt_off0000997d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x997D 18592 bytes
SHA-256: 4ae05b13a8d3623fc8be9d582b03374b6da1b7c2137e59ff761560f156580baa

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