Malicious PDF — malware analysis report

Static analysis result for SHA-256 7814fa2c533f9c79…

MALICIOUS

PDF

45.4 KB Created: 2021-05-16 11:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d8e6a3264ec446d08d17eb0b44eddcf6 SHA-1: 508c0a6dac133a66e774806f28d5a08f4d9a9fb0 SHA-256: 7814fa2c533f9c79567823658a74d466eda76b5557b1bbde22ac6a5b37660bd9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a link farm, all pointing to websites that promise free game currency or hacks. The document body, though partially corrupted, contains text related to 'Free Robux' and a URL that aligns with the heuristic findings. This suggests a social engineering tactic to direct users to potentially malicious or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/free-robux-for-kids-no-verification-game-hack
    • https://www.taline.hr/files/how-to-get-free-roblox-money_GM431946152.pdf
    • https://www.taline.hr/files/easy-coin-master-hack-without-verification_GM406889139.pdf
    • https://www.taline.hr/files/free-robux-no-verification-needed_GM431946152.pdf
    • https://www.taline.hr/files/coin-master-free-spins-reddit_GM406889139.pdf
    • https://www.taline.hr/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • https://www.taline.hr/files/coin-master-cheats-and-hacks_GM406889139.pdf
    • https://www.taline.hr/files/hackear-coin-master_GM406889139.pdf
    • https://www.taline.hr/files/fighting-free-card-coin-master_GM406889139.pdf
    • https://www.taline.hr/files/coin-master-hack-2021-without-human-verification_GM406889139.pdf
    • https://www.taline.hr/files/free-spins-on-coin-master-iphone_GM406889139.pdf
    • https://www.taline.hr/files/free-robux-generator-no-verification_GM431946152.pdf
    • https://www.taline.hr/files/easy-roblox-today_GM431946152.pdf
    • https://www.taline.hr/files/will-minecraft-dungeons-be-free_GM479516143.pdf
    • https://www.taline.hr/files/free-robux-only-username_GM431946152.pdf
    • https://www.taline.hr/files/free-spin-coin-master-2021_GM406889139.pdf
    • https://www.taline.hr/files/get-free-robux-without-doing-anything_GM431946152.pdf
    • https://www.taline.hr/files/free-download-coin-master_GM406889139.pdf
    • https://www.taline.hr/files/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://www.taline.hr/files/free-mojang-account-with-minecraft_GM479516143.pdf
    • https://www.taline.hr/files/coin-master-hacks-xyz_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000479e.bin
e9ae35c11b753dc75191b92f08a882cd837fc6a85f36686ae6a2a0116757c3ee
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479E 26552 bytes
font_01_sfnt_off00008371.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8371 2832 bytes
font_02_sfnt_off00008d22.bin
abcd165e4b695e85902e5e0162dd8c883b494cae8faf27dbfb1f0dc34095f980
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D22 18776 bytes