Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe25b2ee14d82be…

MALICIOUS

PDF

32.9 KB Created: 2021-06-18 03:45:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 788d911aac71c06128311eb01a8fe68d SHA-1: caa19ddb337314e66e0e4a43e802d9ca94623228 SHA-256: 5fe25b2ee14d82beecabe945af8e7ee4741b31de70c1c3f54d4853b5ef5cc684
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/roblox-free-antlers-game-hack. This link is presented as a lure for a 'free generator / game hack', indicating a social engineering tactic to trick users into visiting potentially harmful 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/roblox-free-antlers-game-hack In PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-stranger-things-promo-codes-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/only-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-use-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/wright-your-password-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/pubg-30-uc-buy_GM1330123889.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_off00002be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE4 21904 bytes
SHA-256: 21889ad790dce5049ff7a8a0e5b3ac056035d4e7f31fe1f834c6205a7495a52c
font_01_sfnt_off00005c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3B 18752 bytes
SHA-256: 2d5c7d10337f3a64304412708b0d57b89f6a81a08258fd67d81e8a3e88bc3ee8

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