Malicious PDF — malware analysis report

Static analysis result for SHA-256 40643a1815d77471…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 15:21:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fd6a0ce60406132dcc01d29a3fd15a5b SHA-1: 4963086e43991dc28851b007f0357753e22023c9 SHA-256: 40643a1815d77471d446799ab428a24953e8f10bfe23a79260d78dc085ae1cd8
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/431946152/griffin-that-gives-free-robux-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/how-to-cheat-in-dragon-ball-rage-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacks-for-exq-tops-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-twitter-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-bloxburg-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/synapse-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-vehicle-simulator-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-raps-for-outo-rap-batils-for-roblox-list_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_off000030b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B2 22608 bytes
SHA-256: 0f061bd12c48ebc12001b4d8c7e9da1a865deb4293a9f17f89c072c5bd3a3c5f
font_01_sfnt_off000062ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EC 19220 bytes
SHA-256: 8567483d0ea1d7b9614e98e2eba75091eac5cdbd8c644bc221c3d94c175df6d6

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