Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fefd42b79aeea79…

MALICIOUS

PDF

33.5 KB Created: 2021-07-08 08:55:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 381b6522dffaf24f73d57189e5e00b4e SHA-1: 450cccd6d9ec2dda84ab1a2c03bb37ccae33bb34 SHA-256: 4fefd42b79aeea79821ace2de61078b14b8025dc72cf0d15dfdcd32ab131649d
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.tw/app/406889139/coin-master-gifts-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/farm-life-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-no-human-verification-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/the-best-roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-free-clothes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-shirt-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-unlimited-money-hack-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-an-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-for-free-no-password_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-dlls-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/dbor-roblox-level-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack_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_off00002eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB4 22672 bytes
SHA-256: 9b1fb0b395a56896a67f3d166502f1984ee5f30b5f43c06a8e2ebe9d7e68a16f
font_01_sfnt_off0000615d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615D 17836 bytes
SHA-256: 2b518dfcd0fe0609680a2236c1af8ab2eef27abcf2a8f037ef6c766c284a6818

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