Malicious PDF — malware analysis report

Static analysis result for SHA-256 9302c9eecc4d1258…

MALICIOUS

PDF

57.0 KB Created: 2021-06-03 06:09:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5982eaed068a3187944b233e75b3fdad SHA-1: 8212bf519d893e2d81f79aaccf8edca5c5e8c682 SHA-256: 9302c9eecc4d1258a27ff6f7b76199062b58e33dd8702673eb0770c9fe83715d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, specifically for 'Coin Master', directing users to a URL associated with malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9628

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 https://netcdn.online/app/406889139/how-to-get-free-cards-in-coin-master-game-hack In PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/claim-roblox_GM431946152.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005336.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5336 25776 bytes
SHA-256: 77323f7507688afff4b60c1e4eebf9a8f2e281daa1f01aafa7ca65a77aa5e755
font_01_sfnt_off00008ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF0 3436 bytes
SHA-256: dec17c4d530114d0fe4071f3692eb0b0111cd549239a72aa4eb35932491e8c96
font_02_sfnt_off00009b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B00 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000ae26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE26 18048 bytes
SHA-256: 7ccb643ccaf69ae40f357d9fb3e4200e819aea0a880648815fab1dca28a77bc7
font_04_sfnt_off0000cf6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6B 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0