Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2edbeb4bec878a…

MALICIOUS

PDF

35.7 KB Created: 2021-06-20 14:13:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c09b8e9f9941ece4262f7cc6849e66dc SHA-1: d4391e9c1def321010de87f28d96c2acc5cf82ae SHA-256: 9b2edbeb4bec878a4c6c9de6ef41f62d2336498c888e2ae428c397c7366b7808
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are structured as SEO-optimized links pointing to other PDF files, suggesting a link farm or content aggregation tactic. The document body and heuristics indicate a lure related to game hacks and cheats, likely intended to trick users into downloading malware. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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.co/app/431946152/hacking-troll-2021-ultimate-driving-cars-review-roblox-game-hack
    • http://pesok-rk.ru/images/free-spin-coin-master-instagram_GM406889139.pdf
    • http://pesok-rk.ru/images/minecraft-windows-10-edition-free-download_GM479516143.pdf
    • http://pesok-rk.ru/images/hack-coin-master-no-survey_GM406889139.pdf
    • http://pesok-rk.ru/images/blox-world-free-robux_GM431946152.pdf
    • http://pesok-rk.ru/images/roblox-com-hack_GM431946152.pdf
    • http://pesok-rk.ru/images/free-minecraft-realms-to-join_GM479516143.pdf
    • http://pesok-rk.ru/images/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdf
    • http://pesok-rk.ru/images/who-to-hack-in-roblox_GM431946152.pdf
    • http://pesok-rk.ru/images/free-robux-images_GM431946152.pdf
    • http://pesok-rk.ru/images/get-gold-coin-master-village-hack_GM406889139.pdf
    • http://pesok-rk.ru/images/free-minecraft-accounts-2021_GM479516143.pdf
    • http://pesok-rk.ru/images/free-robux-no-human-verification-2021-working_GM431946152.pdf
    • http://pesok-rk.ru/images/coin-master-card-hack-apk_GM406889139.pdf
    • http://pesok-rk.ru/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://pesok-rk.ru/images/admin-command-gives-you-free-robux_GM431946152.pdf
    • http://pesok-rk.ru/images/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://pesok-rk.ru/images/hack-version-of-coin-master-apk-download_GM406889139.pdf
    • http://pesok-rk.ru/images/free-robux-no-password_GM431946152.pdf
    • http://pesok-rk.ru/images/free-minecraft-skins-ps4_GM479516143.pdf
    • http://pesok-rk.ru/images/free-coin-master-spins-blog_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003109.bin
3f09165a514358dc8abc018a6b2edf2589c5c554e3ac3a123ea2861b8c3c0fb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x3109 22588 bytes
font_01_sfnt_off0000638d.bin
0aa7f6b08c1afacde6a7a83eebdbd0c69072d8ac29028671fb5fa89f0c2a2103
pdf-font-stream PDF embedded font (sfnt) at offset 0x638D 19988 bytes