Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa68f303b74dd640…

MALICIOUS

PDF

30.3 KB Created: 2021-07-19 00:42:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 903457b18cce9274c5d288baf9c059a2 SHA-1: 17f9f561f5a9c4b64b6ef42b34b679f8f3db17b4 SHA-256: aa68f303b74dd6401ef5b99174a47a4a656e6bce6525b57eed443372276fdb11
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, attempting to trick users into clicking on a URL that leads to a 'free generator' or 'game hack'. This URL, http://netcdn.tw/app/835599320/tiktok-like-bot-free-game-hack, is identified as a redirector to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9467

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/835599320/tiktok-like-bot-free-game-hack PDF link annotation
    • https://www.kambati.co.za/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://www.kambati.co.za/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-minecraft-java-account_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_off0000266f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x266F 21900 bytes
SHA-256: 5fb942db8d0a533f15d6acc748770bac27783be7b62cb1358d559b768584cd60
font_01_sfnt_off0000569a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x569A 17672 bytes
SHA-256: 4586a179c1ee4dcb7242a6ebe5d9b9be55f6b3291c614cdd8b5fef0fe9e318cf

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