Malicious PDF — malware analysis report

Static analysis result for SHA-256 720435946959a343…

MALICIOUS

PDF

45.9 KB Created: 2021-05-12 15:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 19cf04bb99970c0d9a8af1432ff08437 SHA-1: 90e5ca10589f8af20cfb0d40f1b38cfea5d70af3 SHA-256: 720435946959a34323d1846c9b441f770db1f05e5f6a056e72a80bbf6fde92be
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/free-2021-robux-game-hack PDF link annotation
    • http://www.pustaka.pn-calang.go.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-25-spins-coin-master-links_GM406889139.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_off000049fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FA 26864 bytes
SHA-256: 6b54ab65483864ded72025538546281c421509c22a350f62ea730c1c6c8ed54c
font_01_sfnt_off000086b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B0 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off00009072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9072 18416 bytes
SHA-256: 24dd33113ad1920a4b79572916f2875f9d05bd64d95cc44e0cd438e20c1ad4df

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