Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c36ba62a226f58…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 09:35:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d88c28c204ee9027ab3a52c6d28bce58 SHA-1: f9af98a9338a5ddb0088dcade90082249c440f7d SHA-256: 96c36ba62a226f585023798a0d7a155330f1a107a62dce7aeadf1c40495f8ef9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering 'free spins' or 'free Robux'. The ML classifier strongly indicated maliciousness, and the presence of numerous links to potentially scam-related content suggests a phishing or scamming attempt. No scripts were extracted, but the document's structure and content are designed to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/free-spins-coin-master-app-ios-game-hack
    • http://muslib.unmus.ac.id/repository/free-minecraft-maps-pe_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/how-to-get-free-stuff-in-the-roblox-catalog-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/how-to-be-a-hacker-in-roblox-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/can-you-give-me-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-hack-uk_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/twitter-free-robux-codes_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/hack-block-piece-roblox-autofarm_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-game-hack_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/wls-3-hacks-roblox_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/pastebin-free-robux-hack-no-wait_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/free-spins-for-coin-master-game_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-accounts-on-ipad-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/hacks-roblox-robux-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-hack-app-android_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/free-minecraft-mods-for-xbox-one_GM479516143.pdf
    • http://muslib.unmus.ac.id//repository/master-free-spins-and-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000303c.bin
6b9cfa3cbe14d540ec823245f854ef74288f3e735337ff8fb298539d01553e18		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x303C 23172 bytes
font_01_sfnt_off0000644a.bin
7a04ea1322d73f03f7683815be4e9f004787eae7d1b28008924f19d2df70de81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644A 18176 bytes

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