Malicious PDF — malware analysis report

Static analysis result for SHA-256 036edfe1fd779caa…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 02:02:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c553230ee3311225cba72134b50ea481 SHA-1: c131a52c7e5b0864fc82149f25bf8b1cb13fb0fb SHA-256: 036edfe1fd779caa45909e3f56454d5a6627426db1643f0ccdecccfd243b401c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free generator / game hack' for Roblox, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or social engineering attempt to redirect users to potentially malicious content or downloads.

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.co/app/431946152/how-to-get-a-free-hat-on-roblox-2021-game-hack PDF link annotation
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-make-free-roblox-audio_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-robloxlover_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-cheats-finding-people-in-games_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-speed-hack-2021-may_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/go-to-robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-admin-hack-for-robux_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/free-roblox-wings_GM431946152.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_off00003171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3171 21744 bytes
SHA-256: 33aff5719528bfbc66617ee46f2dcf4c62e3caac529e150eee2410797be93393
font_01_sfnt_off0000613b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613B 19320 bytes
SHA-256: fa57cb1d881c3b28466bd90b5aa6c4d9e02ed078bac575344a10af5171b28c8b

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