Malicious PDF — malware analysis report

Static analysis result for SHA-256 7672b2a97a39662a…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 01:10:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9fc08c618f32cff6de083e192e57ed90 SHA-1: bcd6acf4dbb1c0cf6f010fa419836f2c8633b8de SHA-256: 7672b2a97a39662a69b727c6c1a27cac0dfbb8bb681fa5e64eae21dde069f8b6
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are presented as game hacks or generators. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a link farm designed to drive traffic or host malicious content. The primary lure appears to be 'Coin Master Redeem Code Free', directing users to a URL that promises game hacks, likely serving as a phishing or malware distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-redeem-code-free-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/free-interview-in-roblox-studio_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-aimbot-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/god-mode-hacks-for-roblox-arsenal-of-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-medieval-hood-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/code-roblox-card-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-hack-no-survey-and-no-user-id_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-roblox-windows-10-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/buy-free-robux-roblox-girl-skins_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/ultimate-random-night-how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-robux-pastebin_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_off0000343a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x343A 22544 bytes
SHA-256: 012c637a2a62edbadd9ad356a09d10872ef539141c8e1194edddf31290d5b946
font_01_sfnt_off00006696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6696 18432 bytes
SHA-256: c68eb17dffb0d99ef1411e37b8b483e0576a304e68482a2bd2f60f2c06c0ac6c

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