Malicious PDF — malware analysis report

Static analysis result for SHA-256 9094ac034623bc42…

MALICIOUS

PDF

35.6 KB Created: 2021-07-03 17:11:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6c4b2980cb6e0ab119b8352b7862db96 SHA-1: c7a0b983e85b3f8524b187891a53c8de0424322d SHA-256: 9094ac034623bc4216de37b5544e59978476f661999270a63228744f0c21889a
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are related to free in-game items or cheats for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the ML classifier strongly suggests maliciousness. The document likely serves as a lure to direct users to potentially malicious sites or to download further malware.

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.tw/app/479516143/how-to-create-a-minecraft-server-for-free-game-hack
    • https://library.sttbandung.ac.id/repository/free-coin-master-spins-link_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/how-to-get-vip-for-free-vampire-hunters-2-roblox_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/broken-bones-iv-roblox-cheats_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/roblox-20-free_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/free-robux-with-no-survey_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/robux-hack-free-robux_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/roblox-murder-mystery-2-hack-exploit_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/free-printable-roblox-coloring-pages_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/free-roblox-accounts-with-robux-that-work-october-2021_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/free-roblox-giftcard-games_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/roblox-bloxburg-tips-and-cheats_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/roblox-jailbreak-how-to-go-through-walls-hack_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdf
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-android_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/how-to-get-free-roblox_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003549.bin
f0ee9e6af8fafa1ac1cb2ee53c9db9622ad4fa1850b95d08fc4d36257a2c39ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x3549 22852 bytes
font_01_sfnt_off00006884.bin
6ccfea5760c71d6df4ee421b3d45b23bb51577d79c71acde93037ba3fd9ba488
pdf-font-stream PDF embedded font (sfnt) at offset 0x6884 18276 bytes