Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd1841ecb68d834…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 15:36:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 92365b9c321abad2a4b4f16a42c73827 SHA-1: 2a0c17c34b7d4ee7d257281cdb88186498eb7c18 SHA-256: ecd1841ecb68d834e15ba0c4f8e909e29931e12ee73902b9aeb1c8ab82b8ccaf
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 sites offering free in-game currency or items. The ML classifier strongly flagged this PDF as malicious, and the presence of a call-to-action button further supports a malicious intent to redirect users to potentially harmful websites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/is-it-possible-to-get-free-robux-game-hack
    • http://killebergsridsport.se/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdf
    • http://killebergsridsport.se/images/free-spins-coin-master-legit_GM406889139.pdf
    • http://killebergsridsport.se/images/roblox-imagine_GM431946152.pdf
    • http://killebergsridsport.se/images/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://killebergsridsport.se/images/free-robux-real-working_GM431946152.pdf
    • http://killebergsridsport.se/images/coin-master-15-free-spin-link-today_GM406889139.pdf
    • http://killebergsridsport.se/images/google-how-do-you-get-free-robux_GM431946152.pdf
    • http://killebergsridsport.se/images/coin-master-unlimited-free-spins-link-2021_GM406889139.pdf
    • http://killebergsridsport.se/images/free-spin-coin-master-link-today_GM406889139.pdf
    • http://killebergsridsport.se/images/minecraft-free-games-no-download_GM479516143.pdf
    • http://killebergsridsport.se/images/hacks-to-get-free-robux_GM431946152.pdf
    • http://killebergsridsport.se/images/coin-master-2021-free-spins-link_GM406889139.pdf
    • http://killebergsridsport.se/images/coin-master-free-raid-link_GM406889139.pdf
    • http://killebergsridsport.se/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://killebergsridsport.se/images/how-to-get-roblox-money_GM431946152.pdf
    • http://killebergsridsport.se/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
    • http://killebergsridsport.se/images/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdf
    • http://killebergsridsport.se/images/coin-master-hack-app-2021-download_GM406889139.pdf
    • http://killebergsridsport.se/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://killebergsridsport.se/images/free-robux-co_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a29.bin
304bd3e5c3c7b90ae53c1277a7029a1b9d49f182b205e490b73576bc10fe0ff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A29 25176 bytes
font_01_sfnt_off00008203.bin
524b785793646940a6547919a11f6df6f4967036cf63710b5a4934c88ca16ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8203 18464 bytes

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