Malicious PDF — malware analysis report

Static analysis result for SHA-256 109a2d58ec7bbdf6…

MALICIOUS

PDF

34.9 KB Created: 2021-06-17 17:21:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ca3afe5f57e30b373e4cf393caee7bd7 SHA-1: bdcb895c842a5e232a77884dcf5afb44d9225ae8 SHA-256: 109a2d58ec7bbdf65ae4fb3da58899cd5b0a911214dcb229a0b92afd021b36d0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as offers for free Robux and game hacks. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/free-robux-codes-2021-march-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/get-coins-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/purest-roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.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_off0000304c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304C 22200 bytes
SHA-256: 521b35442c7fdf4ca4ba0c6dacb4afc7920cfadc784ea0578dee30f4326581c8
font_01_sfnt_off000061bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BB 19656 bytes
SHA-256: 932af5593031860b2635be949c303d63ce0bc5dd9e5bdb863cbbfd8ab721e2e8

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