Malicious PDF — malware analysis report

Static analysis result for SHA-256 28700846f10449c9…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 19:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aa23865828c6bfba242f9aa64cf03573 SHA-1: 0e64ff4ca2dc2bb441fd48c5a93f54ae81172981 SHA-256: 28700846f10449c91d8f4d7d7b2de14e921b0411a7f39ca4802f0ea4df2c40d5
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-hack-2021-without-human-verification-game-hack PDF link annotation
    • https://www.itc-nekretnine.hr/files/coin-master-daily-bonus_GM406889139.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/hack-mining-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/boy-clothes-free-roblox_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-create-a-shorts-roblox-free_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-pretty-much-every-border-game-ever-hack_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-hack-roblox-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-roblox-promotions_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-no-human-verification-or-survey-or-email_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/hack-for-wieght-lifting-simulator-3-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-freebies_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_002_off0000313e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x313E 23424 bytes
SHA-256: c2159d13aff3793f3ad0b4596356269e995bc6652a70588b134028e2f5061389
font_01_sfnt_off00006643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 19304 bytes
SHA-256: 50dc84c10d645d869955afc3455aa83c13b71772cc2407cfff29c5ba194c25aa

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