Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6b9f6d0ebaad7b…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 13:40:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d2d518cf5b4c158c2f7e7635c0bb3041 SHA-1: 5cb6d53f70e90bcf4083c871a40c0f043c465e92 SHA-256: 1b6b9f6d0ebaad7ba7eed9b8ff98b21b78f45469df97e4d0654c650be4ebd040
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'coin-master-get-free-spins-game-hack' page. This indicates a social engineering tactic to trick users into visiting a potentially malicious site. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

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/coin-master-get-free-spins-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/comment-avoir-des-robux-sans-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/banditmask-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-roblox-girl-faceds_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-katana-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/youtubers-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-someones-roblox-account-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/worst-client_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-roblox-game-card-codes_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-people-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-unprotected-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-spins-coin-master-cheat_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_off00003098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3098 22800 bytes
SHA-256: 2368ba6d0863baacb669adc180ebde39f13cf4a302f31e2e06d0a3473f992a8b
font_01_sfnt_off0000636b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636B 18176 bytes
SHA-256: 8a0bb7edf09d6f3952b48e3a2cbb563109f52edf17674e1c6eaebc594b7e7f44

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