Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd31ff96cbcbef6…

MALICIOUS

PDF

46.2 KB Created: 2021-06-11 09:01:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ca9034daf6d6bb95df1f828234734c6d SHA-1: 09f26b6f782d84953390c02a31019e8d237a730c SHA-256: 6cd31ff96cbcbef6835baa980ee35f8b25d76705d06fb07819615d2f57c0c67e
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 0.9864

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 https://netcdn.tw/app/431946152/roblox-music-player-hack-2021-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/best-free-survival-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-link_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
stream_004_off000050a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A3 27012 bytes
SHA-256: ec67e6e06e193a190259b8dbfe47f0da68751ade22bfa45da3ed335857db8f4f
font_01_sfnt_off00008ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE5 19376 bytes
SHA-256: 634eb43b1f21b13bbc103bd288da3db3cffe70a502368839f3ca38e9d1469a66

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