Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3448cc8b5b74917…

MALICIOUS

PDF

41.1 KB Created: 2021-05-20 06:35:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cd9305accb96f2d93a8b4e40c94b0dd3 SHA-1: a3cf08d51336f197bc0b8c086bc196681a98379a SHA-256: c3448cc8b5b74917a75f767b1f16f81559708c68680fb8d8a1ddb14505add5a1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent external URI pointing to sites offering game-related cheats and hacks, strongly suggesting a lure for users to download malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may also instruct users to provide a password, likely to bypass security scanning for encrypted payloads. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-ways-to-get-robux-game-hack
    • http://umksn.pl/images/ww-robux_GM431946152.pdf
    • http://umksn.pl/images/https-oprewards-com-roblox_GM431946152.pdf
    • http://umksn.pl/images/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://umksn.pl/images/spin-coin-master_GM406889139.pdf
    • http://umksn.pl/images/minecraft-that-you-can-play-for-free_GM479516143.pdf
    • http://umksn.pl/images/coin-master-free-spins-hack_GM406889139.pdf
    • http://umksn.pl/images/easy-robux-today-com_GM431946152.pdf
    • http://umksn.pl/images/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://umksn.pl/images/free-pet-food-for-coin-master_GM406889139.pdf
    • http://umksn.pl/images/roblox-person_GM431946152.pdf
    • http://umksn.pl/images/coin-master-hack-version-download-2021_GM406889139.pdf
    • http://umksn.pl/images/free-robux-promo-codes-2021_GM431946152.pdf
    • http://umksn.pl/images/coin-master-daily-gifts_GM406889139.pdf
    • http://umksn.pl/images/level-coin_GM406889139.pdf
    • http://umksn.pl/images/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdf
    • http://umksn.pl/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://umksn.pl/images/coin-master-hack-2021-ios-download_GM406889139.pdf
    • http://umksn.pl/images/free-robux-working_GM431946152.pdf
    • http://umksn.pl/images/free-coin-master-spins-link_GM406889139.pdf
    • http://umksn.pl/images/coin-master-hack-ios-app_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044d2.bin
7e36b4389621d0d5899324820be818a530139c3ba8169cb0711e06bfdeb2bb17
pdf-font-stream PDF embedded font (sfnt) at offset 0x44D2 25436 bytes
font_01_sfnt_off00007c83.bin
4748f019d46a9554f00c7c8cf9bb59ec204dfb95bc520e2d25b5a7c8ef81b270
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 18724 bytes