Malicious PDF — malware analysis report

Static analysis result for SHA-256 593c4f3216c52bb1…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 21:52:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 62bac393b144cc9df1e096550663608c SHA-1: 6a8b33122f87d9ca548642994b8cdebab5c9ce77 SHA-256: 593c4f3216c52bb1a8f9cae33eb0563f2761f7f031c9a9dbeefa69d3ccb3ca3b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages promising free in-game currency or hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests a link farm or phishing attempt. No scripts were extracted, but the document's structure and content indicate a lure for users to click through to potentially malicious websites.

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-free-spins-2021-generator-game-hack
    • http://www.hlad.hr/files/coin-master-free-attack-link_GM406889139.pdf
    • http://www.hlad.hr/files/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://www.hlad.hr/files/how-to-hack-any-magic-in-fairy-tale-revalations-roblox_GM431946152.pdf
    • http://www.hlad.hr/files/coin-master-hack-activegamer_GM406889139.pdf
    • http://www.hlad.hr/files/cheat-da-hood-roblox_GM431946152.pdf
    • http://www.hlad.hr/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://www.hlad.hr/files/levvvel-coin-master_GM406889139.pdf
    • http://www.hlad.hr/files/how-to-hack-other-peoples-accounts-on-roblox_GM431946152.pdf
    • http://www.hlad.hr/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://www.hlad.hr/files/how-to-get-free-tiktok-fans_GM835599320.pdf
    • http://www.hlad.hr/files/how-to-hack-coin-master_GM406889139.pdf
    • http://www.hlad.hr/files/coin-master-hack-apk-app_GM406889139.pdf
    • http://www.hlad.hr/files/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • http://www.hlad.hr/files/get-free-robux-free-pin-codes-2021_GM431946152.pdf
    • http://www.hlad.hr/files/hacks-to-get-robux-in-roblox_GM431946152.pdf
    • http://www.hlad.hr/files/free-robux-time-glitch_GM431946152.pdf
    • http://www.hlad.hr/files/oprewards-com-login_GM431946152.pdf
    • http://www.hlad.hr/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdf
    • http://www.hlad.hr/files/www-roblox-com-sign-up-for-free_GM431946152.pdf
    • http://www.hlad.hr/files/coin-master-free-spins-that-really_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f1a.bin
6ce984d174ba8d95ef683ede542879c1fb75f34d1750bd27322882335a5cb175
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1A 22384 bytes
font_01_sfnt_off000060e9.bin
8a021cd21fa26644957b65d1dffcbe13fd759d196cbdb5d0f528b52a78811c6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x60E9 18576 bytes