Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf26eb84c87bba38…

MALICIOUS

PDF

45.9 KB Created: 2021-06-04 04:01:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 165db9daa530c0212cb8e26de04e16f8 SHA-1: 8bb5ad442a99546a84578912a298a9a07824380c SHA-256: cf26eb84c87bba389875bd00526a5c1befb855ef8b34adaac868da9906b86dcf
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 0.9797

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/coin-master-hack-355-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.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_off00004ece.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ECE 25092 bytes
SHA-256: 68010f70dd6d860927e2e7bd2a8d3875d5fd2887281d295426537d5f528a16e5
font_01_sfnt_off00008788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8788 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000913b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913B 18024 bytes
SHA-256: b68c5b852f7a0dc4cae71688da1440f4897758d0690ddbd86075287d930b5650

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