Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fc38a4da537ec2…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 00:57:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4e2aa882ca09914db8cd8f34bfa280b5 SHA-1: 2b027f0438d4c66d100c8a7629b5a54e0beef625 SHA-256: d3fc38a4da537ec219fbc2b51a3ef3dac473366725ceb2f76cb6cac306faa205
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.tw/app/431946152/robux-hack-no-human-verification-game-hack PDF link annotation
    • http://stimaimmi.ac.id/perpustakaan/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/isle-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/sk8r-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/https-iosgodscom-topic-20213projectrobloxhackbeta_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-money-cheat-no-download_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-only-username_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_off0000304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304F 22332 bytes
SHA-256: 1e0a08a5ebeecf72e193a18c19c67b35d929e865332a3687dbff18b19ffd2e7b
font_01_sfnt_off000061ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FF 19340 bytes
SHA-256: 41a0e445dd5cfc8127d469b764e5159eb585ff2b04ca03f6aaed2423ada6c669

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