Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a484dfed1d798b0…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 16:56:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f3fb0e7b38a891460db55e94bb547f05 SHA-1: 72fc1be61af64ef20dbfdb9d2469217826b92d9e SHA-256: 1a484dfed1d798b0e8731f4b040b53676c82d06cfdf6ba4db1218db85edbe71f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a prominent link disguised as a 'free generator / game hack' lure, which is a common social engineering tactic to trick users into visiting malicious websites. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the embedded URI and the nature of the lure suggest an attempt to redirect the user to a site that likely hosts further malicious content or exploits.

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.tw/app/431946152/get-free-robux-no-human-verification-game-hack PDF link annotation
    • http://digilib-pps.unja.ac.id/repository/galaxywqlfroblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-use-python-for-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-for-roblox-cheats-and-guide-apk_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-online-roblox-tornado-games_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hacks-on-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/robux-hack-infinite-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-games-that-i-can-play-for-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-apk-hack-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-diamonds-coin-master_GM406889139.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_off00003116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3116 21612 bytes
SHA-256: e197c5f34cfc611178b1a8ba92cc901cf3f7736cc22b851aa499fb7858b439a6
font_01_sfnt_off00006087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 19336 bytes
SHA-256: a90fe5938b7c8c7d620c675c61825ef91391e60c8f891a39cc2f187e1f68d0cb

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