Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce693859daaed40…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 23:31:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 57c22508d8aad48352d8c59bebe99bfe SHA-1: 6e427534b375ce1fb52049a3affe905db6a1517a SHA-256: 1ce693859daaed40088d9bd893f5b731d8421c74d8f20ebc070b80e5c443eb6f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9865

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/grabpoints-robux-game-hack.
  • 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/431946152/grabpoints-robux-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pubg-uc-with-jazz-cash_GM1330123889.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/clients-minecraft_GM479516143.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
stream_004_off00004df3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF3 25120 bytes
SHA-256: 83a6716f468b9e4e5d3e952ee15e4a248ba5dbccd4e97737878848dd92b42a7a
font_01_sfnt_off00008590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8590 18480 bytes
SHA-256: 81e4f6a1b4c560ff48fa89910fbd01a1bd1019ab61c59202556c2e43fcf333ec

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