Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42d59f530c52970…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 04:19:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 305d59957e251578b30a1607c5090aad SHA-1: 62c2b42030d372e6b1ea77d7c23f1aae49a030c4 SHA-256: e42d59f530c52970ea5cdebd9b20624c103ea7cde1764d1585f591d0ad1c9673
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 0.9865

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-that-actually-works-2021-game-hack PDF link annotation
    • https://pustaka.mic.sch.id//repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/pubg-uc-to-inr_GM1330123889.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-place_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-com-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
stream_004_off000050bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BB 24088 bytes
SHA-256: e1b255611f73ff3824b60c203bdbff44d15bd7dc0a7ba92dbc8cc2f388598f60
font_01_sfnt_off000087b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B2 19536 bytes
SHA-256: e162f10ab45425f1911b766a767f4688be22e04cba15be94f938466a51fc2df0

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