Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ea291a83667a85…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 06:33:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e9ab33adb5bd9d4b40d6b3ed001e7c51 SHA-1: 236cdaad1c466f067f98a81162495323c4cde206 SHA-256: a2ea291a83667a85b3788d30ae5081310dc521033e35e87f2952d3f0788154a8
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 0.9826

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-free-spins-link-today-new-2021-game-hack PDF link annotation
    • http://felmerihomes.com.au/images/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://felmerihomes.com.au/images/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://felmerihomes.com.au/images/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://felmerihomes.com.au/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://felmerihomes.com.au/images/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://felmerihomes.com.au/images/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://felmerihomes.com.au/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://felmerihomes.com.au/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003ba3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3BA3 24960 bytes
SHA-256: b0ac0601f15e3697af704a5a0a7b80010069d901e19ac8d36b08df87a406a153
font_01_sfnt_off00007522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7522 3380 bytes
SHA-256: 1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
font_02_sfnt_off0000810a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810A 18976 bytes
SHA-256: 9ab4b87832590d82aec569b9c8693c2016d5d9151569e528de1ed13ad8a1cb2c

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