Malicious PDF — malware analysis report

Static analysis result for SHA-256 0163dd55d569882f…

MALICIOUS

PDF

34.6 KB Created: 2021-06-20 07:09:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 84dea6a3d8e499a65d894d83710e4961 SHA-1: 65be2db89175d78349a3da2e8cfc92290737ed97 SHA-256: 0163dd55d569882f411dc4174cfe5e5a89380460ed3c8ef49c0235b5ac5758d2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains numerous embedded links and a primary URL, all related to obtaining free in-game currency or hacks for popular games. The heuristic firings indicate a link farm and a malicious PDF classification, strongly suggesting the document is designed to trick users into downloading malware. The presence of a call-to-action phrase further supports this malicious intent.

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/free-robux-and-obc-hack-game-hack
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-do-you-get-free-robux-on-mobile_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/get-free-coins-on-coin-master_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-hack-into-your-roblox-account_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-free-cards-link-2021_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-free-coin-hack_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-hack-levels-in-roblox-naruto-final-bond_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/hack-coin-pro-coin-master_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-hack-roblox-2021-mac_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-do-you-get-roblox-for-free_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/hack-week-for-roblox_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/como-conseguir-robux-gratis-sin-hacks-2021_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-comcom_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/are-minecraft-realms-free_GM479516143.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-hack-ga_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-hack-2021_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/rbx-free-robux_GM431946152.pdf
    • https://www.roblox.com/.I
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031cd.bin
66f7420e579b74adb9cf7adbf1443ebc49f6cd62e3294398115c78c0291f9026
pdf-font-stream PDF embedded font (sfnt) at offset 0x31CD 22176 bytes
font_01_sfnt_off0000623b.bin
8915caec6d55ae5af585734d99594561660052e6dbdf264f1ae25fcd21f2f660
pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 19060 bytes