Malicious PDF — malware analysis report

Static analysis result for SHA-256 661fc1fb6e9da64b…

MALICIOUS

PDF

45.5 KB Created: 2021-06-09 04:53:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e297d3d9fb39707f9711877c97da89dc SHA-1: 6a1269f47de26bf36c72b134dfd84f5f9d1680d7 SHA-256: 661fc1fb6e9da64b9641cc65fe9b8804e9914c59cf3988540d3dd3824d4e0627
102 Risk Score

Malware Insights

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

This PDF document exhibits malicious characteristics, primarily through its extensive use of external links to pages offering game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting an attempt to direct users to potentially harmful content or exploit kits. The ML classifier also flagged this PDF with high confidence, reinforcing the malicious assessment. The document's content and structure strongly suggest a lure for downloading unwanted or malicious software.

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 https://netcdn.tw/app/431946152/roblox-jailbreak-redboy-hack-game-hack
    • http://opac.akafarma-aceh.ac.id/repository/roblox-bubblegum-simulator-steal-hack_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-cards-hack_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/80-free-spins-coin-master_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/tiktok-for-free_GM835599320.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-apk-iphone_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-no-gift-card_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/hack-version-coin-master-apk_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-attacks-coin-master_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/all-minecraft-handbooks_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/update-coin-master-free-spins_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-project-jojo-hack_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-fan-page-facebook_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-gift-link-hack_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-free-app_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-without-verify_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-tiktok-likes_GM835599320.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-girl-hair-not-a-model_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-hacks-list_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/pokemon-go-free-vs-pro_GM1094591345.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053e3.bin
e7ab90e60aa989d464b26f7842fbf1224c05391f32e8ec295c7bf224521c57c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x53E3 25872 bytes
font_01_sfnt_off00008dbd.bin
ebb9078ea3951871d4b7a0f2732b7fd3ef07309be3d399a4e2e869f96404c0d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBD 18824 bytes