Malicious PDF — malware analysis report

Static analysis result for SHA-256 afcc0f0a0b147d49…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 11:32:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ce78e23789a13e6e24ab2a8a0b9421c4 SHA-1: a09e527d001b60d8a267d17178390722a1a681f7 SHA-256: afcc0f0a0b147d498706fe4f7a0030068e4d9783ddbf6a13da584d0fd2d76a51
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm or content-luring scheme. The document body and extracted URLs promote free game items and hacks, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent to redirect users to potentially harmful content.

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/431946152/cool-roblox-t-shirts-free-shipping-game-hack
    • http://pustaka.mesin.ft.unand.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/minecraft-free-minecoins_GM479516143.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/easy-robux-hacks-2021_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-obc-for-roblox-august-2021_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/coin-master-332-apk-free-download_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-robux-no-gift-card_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/roblox-face-err-free_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/ways-to-get-free-robux_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-star-codes-for-roblox_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-get-a-free-membership-on-roblox_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/coin-master-free-spins--spins_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-avatar-roblox_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-shirt-design-maker-roblox_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/2021-free-migrated-acounts-roblox_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-do-you-get-free-skins-on-roblox_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-free-builders-club-roblox-2021_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/pet-ranch-simulator-roblox-hach-cheat_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/coin-master-free-spin-now_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003073.bin
156144e7b7052e98d022a02d7478373a419548a932bf24b7aad5226d13024060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3073 21320 bytes
font_01_sfnt_off00005ec9.bin
0ae2494b9671e90aa35d0d36643095715dc46c1fcdeabffcdb10b3d009b9209b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 19216 bytes

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