Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5e098941afb8d2…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 05:15:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9b0a2a337a84e4e9117267b002c0d0e1 SHA-1: be74aa507d8881705d5180f23cc823945e298097 SHA-256: fb5e098941afb8d23532fdc0b5d4a2a4559d2353b3d17489614f1b926fe123d9
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 0.9980

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 http://netcdn.co/app/431946152/how-to-play-pay-to-play-roblox-games-for-free-game-hack PDF link annotation
    • http://razredna-nastava.net/files/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/infinite-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-life-in-paradise-free-admin_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-solar-tycoon-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-hack-android-no-human-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/pokemon-go-free-12-km-eggs_GM1094591345.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-hack-game_GM431946152.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_off000031cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CD 22368 bytes
SHA-256: 9e5f8bfdd2b0ec785de93cea612aedb29e59c67c614dd5ab4538b8f5b877c588
font_01_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 19408 bytes
SHA-256: abc7a7fd18344fac062e64384e611e16d041e382eff39e11baf592371fc764e4

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