Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ace40ca3d0bb0e0…

MALICIOUS

PDF

44.5 KB Created: 2021-06-09 02:28:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3b39fd0c3386ec3b55fc20c99360ac77 SHA-1: 9a54ab3eccd32e60654f5b668314a19f69cd7ecd SHA-256: 7ace40ca3d0bb0e07383fee797106955567722c7dddf9653311bc29daf065442
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.tw/app/431946152/cool-roblox-weapons-cheat-engine-game-hack PDF link annotation
    • https://pustaka.mic.sch.id//repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-come_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://robuxhaxs.comIn 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_off00004ecf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ECF 25044 bytes
SHA-256: d7fb729080b21ff126c72c3b63cde55e87646a587d44e5784dbbee7675d81cfa
font_01_sfnt_off000088cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CF 19064 bytes
SHA-256: 2009e1d3c75f1fdb0d85bd5b4a314b79da58abc5c9f8642654c1a5f0cf7e2bab

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