Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c92a91a4e8508e…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 13:45:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bd9972a2237343465026c92d7880790e SHA-1: 1acea9244e6248b573fe4e30f0511a361b9363bf SHA-256: c2c92a91a4e8508e37b295fe2de47ebf00244c7df40f3bf112a69e84c15417c1
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 0.9769

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/479516143/free-games-like-minecraft-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-account-roblox-2021_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_off00004fff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFF 26088 bytes
SHA-256: 3131ab29bb076e7bbb1750d05ad022362f2f066fb76bff8e63143e71da6a354b
font_01_sfnt_off00008b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B92 3092 bytes
SHA-256: 1aa0e4457f2fdbd20c643bc065edafaa683fd9dc2930c01c4492bce0fd9a7f02
font_02_sfnt_off0000963e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x963E 17996 bytes
SHA-256: 6316af01e653c53aa8313e9ee065e63d320a9dd1c98e4ac08eccbec55cd1c79a

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