Malicious PDF — malware analysis report

Static analysis result for SHA-256 54724a8a149a7853…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 12:11:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 532c68a10a974fbf7154434302a691bd SHA-1: 7fd6be6c07dc5b67e9a02ee97a8dff44f8815f8e SHA-256: 54724a8a149a7853e4642cf4e054fd6f7206d3e978f3b832551d67e00401b990
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/free-spins-coin-master-2021-today-game-hack PDF link annotation
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-script-exploit-to-use-in-roblox_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/pokemon-go-free-yellow-team_GM1094591345.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/comment-installer-un-cheat-sur-cbro-roblox-franais_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/el-mejor-hack-para-roblox-marzo-2021_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/secret-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/make-free-robux_GM431946152.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
font_00_sfnt_off00003494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3494 22796 bytes
SHA-256: 8ee37fa3c7bd738574f406cac404e145450734f730101619c0a3bdaa5c6596e2
font_01_sfnt_off000067c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C5 18928 bytes
SHA-256: dadcf5174bb2e6041b94f83e832c5e3e9a18ba888fbfa9b44f22d907c203bba1

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