Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cdd9b86f4a6fdbf…

MALICIOUS

PDF

45.5 KB Created: 2021-06-13 15:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 54155e4e5162c45e7efa894efbce389a SHA-1: 29664ddbd3d8263a781ad4b676a2f32c5a0827c2 SHA-256: 6cdd9b86f4a6fdbfc44f6bab02403f8c6d1785463eeeb9d1badd0b3ba9791c11
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a PDF link farm, pointing to external resources. The document body, though partially corrupted, includes a URL related to hacking Roblox servers, suggesting a lure for potentially malicious content or scams. The presence of a ML classifier flagging the PDF as malicious and the high number of external links indicate a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/how-do-people-hack-roblox-servers-game-hack PDF link annotation
    • http://sbm-nn.ru/images/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-roblox-accounts-with-robux-and-obc-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-robux-for-free-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/pokemon-go-no-free-box_GM1094591345.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED3 27772 bytes
SHA-256: ade8c184d205f685250789600bceb2c08542ab26e5d0a4670c8b4950ec1f5a51
font_01_sfnt_off00008d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1A 18956 bytes
SHA-256: 1ad116568702f85df2cbf39e5e125533b7e79a8af33105ced60f2863e600786f

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