Malicious PDF — malware analysis report

Static analysis result for SHA-256 181f5deb21d53c1c…

MALICIOUS

PDF

37.5 KB Created: 2021-06-28 11:59:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e86d60f1e125f9b17e5ed8a03983fcfe SHA-1: 605cb5625609bb8c6aba9b36a69f92dff9eb8254 SHA-256: 181f5deb21d53c1c6b3c33f6ecdbb72a49e243e6f55f5f8997e7af83772d5b41
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to 'free Robux' and game hacks, indicating a social engineering attempt to redirect users to potentially malicious websites. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the lure suggest a phishing or malware distribution attempt.

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/free-robux-without-playing-games-game-hack PDF link annotation
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/free-roblox-military-script-executor-2021_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/wheel-decide-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/im-hack-you-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/hack-booga-booga-roblox-gratuit-2021_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/roblox-free-muscle-t-shirt_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/free-dll-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/how-to-play-heroes-online-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/hackear-usuario-roblox_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.waelhamadehgallery.com/uploaded_files/userfiles/files/mc-hacks_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_off00003762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3762 23084 bytes
SHA-256: c2d150c324f58156d60f8872dca46cc89815d5b84e3b9e5e2aa7b4657a99be8a
font_01_sfnt_off00006b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3A 19972 bytes
SHA-256: e38fe448224fd2467f5507f935ec875570205e70b23ec32fa5eddaaa9b732996

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