Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0eb57422af831b3…

MALICIOUS

PDF

45.7 KB Created: 2021-05-12 07:32:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1809c75f51c0ca1dc340795b5dc54fad SHA-1: 8081ab8435bc74e533231b8ae94b3b833fbbc6d0 SHA-256: a0eb57422af831b370a984e3ddc794afa52f05c4ebcd3908ca7144215f763bb4
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 0.9432

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/431946152/earn-free-robux-for-roblox-game-hack PDF link annotation
    • http://handimanlibrary.org/repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://handimanlibrary.org/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/minecraft-free-education_GM479516143.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_off00004972.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4972 26504 bytes
SHA-256: 143d0f4177bf2fceb2c35e1d406ad60f25fd1e47f3e22b79577527257d059686
font_01_sfnt_off00008633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8633 2880 bytes
SHA-256: 106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081
font_02_sfnt_off00009023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9023 18316 bytes
SHA-256: 81577c12f28394e63c3fe269139937f952c5f2f271c4ac7315843a65914bc4b9

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