Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4e65edc41630d4…

MALICIOUS

PDF

43.8 KB Created: 2021-05-16 10:23:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 334a28c59b13dad32a05aa9a27426cda SHA-1: e598be5dd448465af04b63d984fe2c69c149a4ed SHA-256: 5a4e65edc41630d448175efd17fd26f5069fadcc5b10f391267120967c96fe86
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a visible download lure, strongly suggesting it is designed to trick users into downloading further malicious content. The ML classifier also flagged this PDF with high confidence. While no scripts were directly extracted, the presence of external URIs and the document's deceptive content indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.xyz/app/479516143/minecraft-games-online-free-no-download-game-hack
    • http://hospitalsalamanca.cl/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://hospitalsalamanca.cl/images/free-spins-coin-master_GM406889139.pdf
    • http://hospitalsalamanca.cl/images/how-to-hack-coin-master-using-es-filer_GM406889139.pdf
    • http://hospitalsalamanca.cl/images/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdf
    • http://hospitalsalamanca.cl/images/roblox-e-free_GM431946152.pdf
    • http://hospitalsalamanca.cl/images/minecraft-java-account-free_GM479516143.pdf
    • http://hospitalsalamanca.cl/images/free-robux-on-iphone_GM431946152.pdf
    • http://hospitalsalamanca.cl/images/abd-roblox_GM431946152.pdf
    • http://hospitalsalamanca.cl/images/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://hospitalsalamanca.cl/images/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://hospitalsalamanca.cl/images/free-robux-hacks-no-verification_GM431946152.pdf
    • http://hospitalsalamanca.cl/images/free-coins-coin-master-spins_GM406889139.pdf
    • http://hospitalsalamanca.cl/images/free-robux-hack-no-verification_GM431946152.pdf
    • http://hospitalsalamanca.cl/images/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • http://hospitalsalamanca.cl/images/www-coinmaster-com_GM406889139.pdf
    • http://hospitalsalamanca.cl/images/coin-master-hack-club_GM406889139.pdf
    • http://hospitalsalamanca.cl/images/coin-master-free-cards-hack_GM406889139.pdf
    • http://hospitalsalamanca.cl/images/roblox-hack-site_GM431946152.pdf
    • http://hospitalsalamanca.cl/images/hack-coin-master-mod-apk_GM406889139.pdf
    • http://hospitalsalamanca.cl/images/coin-master-free-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a02.bin
1cf4d5de15de1aaf7c304b3c2c32beea1cb924658cd874eeaf74933a092a2b95		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A02 29812 bytes
font_01_sfnt_off00008863.bin
5ca17b28647aef81bcc84b8dc260964849d2cd995c521d110ee9368522ce90b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8863 18548 bytes

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