Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e874d52e6b4119…

MALICIOUS

PDF

48.7 KB Created: 2021-06-09 10:06:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 25fbd92bf199459c49206f6cba606dc5 SHA-1: a76f07f0502c0fa8a7a8a7cbcf9099d2c719db8a SHA-256: 13e874d52e6b4119ba88367f35f874d3a4d0d2ce6dead490f8e36fdfe106c8a7
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The document body, though partially corrupted, contains a URL related to 'roblox game hack', indicating a lure for potentially malicious content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-to-get-wings-for-free-on-roblox-game-hack
    • http://alcomet.ru/images/irobux-com-redeem_GM431946152.pdf
    • http://alcomet.ru/images/coin-master-free-spin-codes_GM406889139.pdf
    • http://alcomet.ru/images/how-to-download-minecraft-for-free_GM479516143.pdf
    • http://alcomet.ru/images/free-spins-coin-master-2021_GM406889139.pdf
    • http://alcomet.ru/images/free-robux-no-verification-needed_GM431946152.pdf
    • http://alcomet.ru/images/how-to-get-free-views-on-tiktok_GM835599320.pdf
    • http://alcomet.ru/images/coin-master-hack-apk-ios_GM406889139.pdf
    • http://alcomet.ru/images/free-robux-working_GM431946152.pdf
    • http://alcomet.ru/images/free-robux-today_GM431946152.pdf
    • http://alcomet.ru/images/free-tiktok-like_GM835599320.pdf
    • http://alcomet.ru/images/coin-master-hack-tool-generator_GM406889139.pdf
    • http://alcomet.ru/images/free-tiktok-followers-without-verification_GM835599320.pdf
    • http://alcomet.ru/images/free-roblox-generator-no-download_GM431946152.pdf
    • http://alcomet.ru/images/can-you-give-me-free-robux_GM431946152.pdf
    • http://alcomet.ru/images/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://alcomet.ru/images/como-se-hace-hacker-en-roblox_GM431946152.pdf
    • http://alcomet.ru/images/aimbot-exe-roblox_GM431946152.pdf
    • http://alcomet.ru/images/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://alcomet.ru/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdf
    • http://alcomet.ru/images/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000537c.bin
cbf3784f1ac68d25cd028c0fbce95253a3b37067bcba4f906577bd6455ed072f
pdf-font-stream PDF embedded font (sfnt) at offset 0x537C 26952 bytes
font_01_sfnt_off00008fd2.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD2 2880 bytes
font_02_sfnt_off000099bd.bin
7797b9fe2f2fb37324558a121c520426862460f6ace7b831b0ae16658aa94800
pdf-font-stream PDF embedded font (sfnt) at offset 0x99BD 18824 bytes