Malicious PDF — malware analysis report

Static analysis result for SHA-256 28204b99e7a19fa9…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 10:04:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b1e41e3320f51c10d82d983d5e47cec8 SHA-1: e64a19786585a7827664f0028b39cbde4dfc9c38 SHA-256: 28204b99e7a19fa9592fccd2b4d9c0f9d3e266020fc3785ca6a272aa7aedf665
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 0.9748

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.online/app/406889139/how-to-get-stuff-that-cost-coins-free-mcpe-master-game-hack PDF link annotation
    • http://library.patria-artha.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/hack-roblox-dll_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.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_004_off00005260.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5260 24072 bytes
SHA-256: 11d371ab50680fcb252a7fa1a9a99d0281d77805a860f75f5ee623517b1e64ca
font_01_sfnt_off000088f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F3 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000092a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92A5 18356 bytes
SHA-256: 3101775d535154cc7fa4b6a00cd898a447eb1921ab62fdc8d89394fd7b19c794

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