Malicious PDF — malware analysis report

Static analysis result for SHA-256 37894bb18a69c4ec…

MALICIOUS

PDF

33.8 KB Created: 2021-07-07 08:07:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 82bcebe353e0bdcf8dd8b44f841da61d SHA-1: da4c4b383295e7aed858d05f95051d3983c562fe SHA-256: 37894bb18a69c4ec11c2e6c5ecd45b099fa453309b27e6cde1ca14d03359cf33
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/479516143/minecraft-hacked-client-112-2-game-hack PDF link annotation
    • https://zd407.com/ocean_shop1/admin/upload/files/synapse-x-hack-roblox-downlod_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/hack-roblox-script-pastebin_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/robuxian-hack-roblox-animations_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/com-roblox_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-site-surveys_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/synapse-executor-roblox-x-free_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/roblox-pokemon-brick-bronze-shiny-hack_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-make-t-shirt-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-get-free-robux-on-ipad-no-password_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-roblox-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/20210-free-robux-daily_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-hack-a-roblox-account-2021-easy_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-daily_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/bee-swarm-hack-roblox_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_off0000307d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307D 21884 bytes
SHA-256: be3ba73192457a465c464a5c7c1e6da7c33945c1321901cdfccbbfaa09306038
font_01_sfnt_off000060ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 18504 bytes
SHA-256: 7d083d3a15ead7460ad8e45f375fb199430cdb89a1cd4a9888d4caef1733d6f3

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