Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb90e71af37e11e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 04:27:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c6c9bb4278ce012b27676c188b5605d5 SHA-1: 114bb0b42ed136e79cdd53e4ac829228658810b0 SHA-256: ecb90e71af37e11eb7e4dab3b226afc8d09bda9bc519be38867674a697b72d51
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/406889139/free-coins-coin-master-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/cheat-codes-for-tower-battle-simulater-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-ultimate-driving-roblox-check-cashed_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-survey-no-download-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-a-free-skin-in-strucid-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-adopt-me-money-cheat_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/script-cheat-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-bear-mask-wear_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/pokemon-go-free-items_GM1094591345.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/telecharger-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/cheats-for-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_off000030c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C2 23004 bytes
SHA-256: 2d9c34da32381e17c0f674efc11f3b1ab6935cf5bb7f952df65538c15e60e544
font_01_sfnt_off00006449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6449 17996 bytes
SHA-256: db592684bbdaaeb7647633841870edbd5981f70e843d3403859f62ceb8e0c83d

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