Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4effd2e9b2dfe1…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 03:56:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 56ba4ccf15ac4f7b948243b610b4c074 SHA-1: 5843e820e823e71486bc4890f1d461914f7c2b47 SHA-256: ec4effd2e9b2dfe189a57c44fbf3497bf21c86bc832e77e0073fb289684e7aee
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.co/app/431946152/cheat-roblox-speed-simulator-2-codes-game-hack PDF link annotation
    • http://artistaone.co/userfiles/files/how-to-animation-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-secret-cheat-codes-for-music_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-do-you-get-free-chat-on-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/rbxdemon_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/como-ser-hacker-en-roblox-sin-descargar-nada_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-2021-new_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-claim-spins_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_002_off00003138.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3138 22172 bytes
SHA-256: 7108c105c979cdb111ef610062b61e0b83d07b539dd3946ac38cf2f1fc03397a
font_01_sfnt_off00006226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6226 19748 bytes
SHA-256: 11ec2b457487e09fdcc4ada9ebbdc1446dfdf51b14a85a701de453e46557f81a

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