Malicious PDF — malware analysis report

Static analysis result for SHA-256 4672231071a821a2…

MALICIOUS

PDF

35.5 KB Created: 2021-07-09 07:32:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8a84bf01eccfd26678cefcdc0fb9e4b0 SHA-1: 9cc29f17abac6c094cb52274d8ff1dbc489d6794 SHA-256: 4672231071a821a21924deca1befd96fb0d40ae35b64f2fb96f77171c9a584f4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages promising game hacks and free currency. The ML classifier strongly indicated maliciousness, and the presence of numerous links to potentially malicious domains suggests a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and content strongly imply a lure for users to click through to compromised or malicious sites.

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/coin-master-2021-free-spins-link-blogspot-game-hack
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-daily-rewards_GM406889139.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/free-robux-without-doing-anything_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-vip-hack_GM406889139.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/hack-velocidad-x3-roblox_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/free-robux-no-verification-required_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/free-robux-hacker-typer-script_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/how-to-hack-any-roblox-account-with-their-roblosecurity_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/sites-to-get-free-robux_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/free-robux-hack-apk-download_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/robux-free-inlimited_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/free-draw-roblox_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/free-robux-real_GM431946152.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/fb-coin-master_GM406889139.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-500-spins-link_GM406889139.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/best-free-minecraft-hacked-client_GM479516143.pdf
    • http://collectionsuncovered.com/media/storage/editor/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003351.bin
d1099c46b53d9693f121458d242c87ef1e509a6840fb8ff0766acb297a0992ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3351 22620 bytes
font_01_sfnt_off000065ca.bin
19b793172c3e4e67372f0948662efcb12590f1ebd1aedebdca9f554a15f0a298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 19036 bytes

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