Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b43046c8ed72ab2…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 18:36:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9b301ebf060f71e82482d1a8ddfb67c5 SHA-1: abb8c96b590bfcbfeb1304e091312804a479029b SHA-256: 2b43046c8ed72ab2fbd250d22794a8ea2096bd74a54104decb035ef8936507d3
82 Risk Score

Malware Insights

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

The PDF document contains a high-confidence heuristic firing for a game hack lure, directing users to a suspicious URL. The document body and extracted URLs reinforce this theme, suggesting a social engineering tactic to trick users into visiting a site that likely hosts malware or phishing content. The ML classifier also flagged the PDF as malicious.

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/admin-commands-roblox-hack-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-bad-business-hacks_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-cheats-deutsch-pc_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/pubg-uc-or-ag_GM1330123889.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/www-roblox-play-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/gamepass-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-sell-stuff-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-dungeons-free_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
font_00_sfnt_off00003025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3025 22084 bytes
SHA-256: 13ca341cbab0db814b217862fd7cdb6a1afaf8edb9edd8d78ed17311d98d2fc5
font_01_sfnt_off0000613d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 19208 bytes
SHA-256: 03e45586fb9edcd11822978e8654f10a7a301753ba46f5422028a0e9f8c7dc86

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