Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d5b35eedaf3223…

MALICIOUS

PDF

40.7 KB Created: 2021-05-14 13:55:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4b4e0825d3b6a79b1d8ea3cd887ac082 SHA-1: d118172c71c175e0c0d98e3a189db191fd64a4d6 SHA-256: 20d5b35eedaf3223b43a225b7d0451eafa1ae5f6cc51c723115b566fef7bf8a1
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 0.9971

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.xyz/app/406889139/coin-master-spin-pattern-game-hack PDF link annotation
    • http://itc-nekretnine.hr/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-free-spins-2021-ios_GM406889139.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_003_off0000459d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x459D 24464 bytes
SHA-256: 666c9dfc9f462d70bced00106273e88358f3e20117223f5528e8269f06fe6729
font_01_sfnt_off00007db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB7 17876 bytes
SHA-256: bd22fd35e13567494ff4a803842d6b5fa952e975cd9e2293b3775db85ba13e50

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