Malicious PDF — malware analysis report

Static analysis result for SHA-256 932301189bb9b4e3…

MALICIOUS

PDF

46.9 KB Created: 2021-05-12 21:03:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 77f65d259aa208d36fd9114ad8482d7a SHA-1: 8586ae742c11831762463c9a11b8565d4217996b SHA-256: 932301189bb9b4e311fad35395c3c2f7f3d677f2ee2f79c24751fffd38777234
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are part of a link farm, and displays a fake CAPTCHA to trick users into clicking them. The primary URL, https://netcdn.xyz/app/431946152/free-roblox-toy-codes-2021-game-hack, suggests a lure related to game cheats or codes. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/free-roblox-toy-codes-2021-game-hack
    • http://www.dimalcco.com/images/free-roblox-premium_GM431946152.pdf
    • http://www.dimalcco.com/images/daily-coin-master-spins_GM406889139.pdf
    • http://www.dimalcco.com/images/free-coins-coin-master-today_GM406889139.pdf
    • http://www.dimalcco.com/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdf
    • http://www.dimalcco.com/images/coin-master-free-spins-link-today-hack_GM406889139.pdf
    • http://www.dimalcco.com/images/coin-master-free-spin-app-apk_GM406889139.pdf
    • http://www.dimalcco.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://www.dimalcco.com/images/how-to-hack-roblox-on-mobile_GM431946152.pdf
    • http://www.dimalcco.com/images/free-robux-hack-generator_GM431946152.pdf
    • http://www.dimalcco.com/images/coin-master-gold-cards-hack-2021_GM406889139.pdf
    • http://www.dimalcco.com/images/roblox-script-executor-free_GM431946152.pdf
    • http://www.dimalcco.com/images/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://www.dimalcco.com/images/coin-mast-hacks_GM406889139.pdf
    • http://www.dimalcco.com/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdf
    • http://www.dimalcco.com/images/give-me-free-robux_GM431946152.pdf
    • http://www.dimalcco.com/images/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://www.dimalcco.com/images/free-coins-and-spins-2021_GM406889139.pdf
    • http://www.dimalcco.com/images/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://www.dimalcco.com/images/roblox-fun-com-free-robux_GM431946152.pdf
    • http://www.dimalcco.com/images/minecraft-packs-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000495f.bin
ecb92d3920df6b2b777b63532d7ee130188a2f459e3e90a0c1879e1db44913f4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495F 33552 bytes
font_01_sfnt_off00009408.bin
310b0eb167ed5acb3e0393954d8d7f46b13cc3d4732db83d1204f458420b6348
pdf-font-stream PDF embedded font (sfnt) at offset 0x9408 18704 bytes