Malicious PDF — malware analysis report

Static analysis result for SHA-256 58994c1caeb4d390…

MALICIOUS

PDF

34.6 KB Created: 2021-07-01 07:30:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c315c7faeb9e1afa7fa09df8e306cf54 SHA-1: 340e3751caef61004608b27df0468ee3f8af8703 SHA-256: 58994c1caeb4d390c4c6ea7df36b0fc420cdcdc3542351c8dd26b107b06c303b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristic firings indicate a lure for 'free generator / game hack' content, suggesting the intent is to trick users into downloading or visiting malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-level-7-exploits-2021-roblox-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-generator-only-enter-password_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-para-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-items-in-the-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/best-groups-to-join-for-free-robux-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hack-robux-download-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/2021-roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-roblox-accounts-on-ios_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-stop-roblox-from-crashing-when-using-hacks_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-any-roblox-games-unlimited-health_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/www-roblox-com-drivers-upgrade-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hack-unlimited-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-obby-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/fly-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-on-roblox-jail-breaker_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_off00002f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2C 22124 bytes
SHA-256: 6a174ae6d072c06a8766419ba43bdf189c6a9be1c2a4d171494c65a74aaee754
font_01_sfnt_off0000603c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603C 19624 bytes
SHA-256: 78d8d04093347249045a6bb7f692187268df7fed1433042cdef7eeeffe869c56