Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b64adae4f5b012b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 15:48:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2458eb8985e9642c6cb0d67fab3ff2ef SHA-1: 44c576b2da5905d6697df093afee0686bb5ec5be SHA-256: 5b64adae4f5b012bd321a4aa47cc92c092a885eadfd77e8806046fb3493258f5
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs that form a link farm, likely intended to drive traffic to scam or malware download sites. The document body and extracted URLs explicitly mention game cheats and free in-game currency for popular games, indicating a social engineering lure. The ML classifier and PDF link farm heuristics strongly suggest malicious intent, likely to trick users into downloading unwanted or malicious software.

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/roblox-free-robux-cheats-2021-game-hack
    • http://perpusfkip.upstegal.ac.id/repository/cheat-roblox-jailbreak-2021_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdf
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/free-song-id-roblox_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-free-robux-hacks-online_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • http://perpusfkip.upstegal.ac.id/repository/is-minecraft-java-edition-free_GM479516143.pdf
    • http://perpusfkip.upstegal.ac.id/repository/my-account-was-hacked-roblox_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/counter-roblox-cheat_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://perpusfkip.upstegal.ac.id/repository/rc7-roblox-download-free_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-generator-2021_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/freenoodle-roblox_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-hack-on-iphone_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/bux-life-free-robux_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/instant-free-spins-coin-master_GM406889139.pdf
    • http://perpusfkip.upstegal.ac.id/repository/how-to-hack-anyne-with-editthiscookie-roblox_GM431946152.pdf
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-spin-link-today-2021_GM406889139.pdf
    • http://perpusfkip.upstegal.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://perpusfkip.upstegal.ac.id/repository/how-to-hack-linkmon99-roblox-account_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003076.bin
9dee297f603682d2e18a401d21f6ce080785491a79ad3700a16314adf935477a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3076 22516 bytes
font_01_sfnt_off000062b7.bin
bbcb60a6691be187964bd810298b617e87fa13fa1af380331658f3f009f00e4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B7 19464 bytes

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