Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57a7edbd5fcdcc0…

MALICIOUS

PDF

42.9 KB Created: 2021-05-17 23:10:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e258eb46789c1b304013ddf8811a3430 SHA-1: 7ba0a19e20726b611fe26b3b12c04b6e15fbae84 SHA-256: b57a7edbd5fcdcc0801316a5e981c476b377f62b82545661b61757befe867ab7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA to trick users into interacting with it, which is a common social engineering tactic. It contains an embedded URI pointing to a suspicious URL, likely intended to lead the user to a malicious download or phishing page. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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/406889139/coin-master-free-spins-link-blogspot-2021-game-hack
    • http://pa-kabmadiun.go.id/images/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/free-robux-gen_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/coin-master-mod-version-free-download-ios_GM406889139.pdf
    • http://pa-kabmadiun.go.id/images/coin-master-mod-apk_GM406889139.pdf
    • http://pa-kabmadiun.go.id/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/minecraft-com-free_GM479516143.pdf
    • http://pa-kabmadiun.go.id/images/how-to-hack-coin-master-ios-2021_GM406889139.pdf
    • http://pa-kabmadiun.go.id/images/play-roblox-free-online_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/legit-free-spins-coin-master_GM406889139.pdf
    • http://pa-kabmadiun.go.id/images/get-roebucks-com_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/free-robux-hacker-us_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/free-robux-no-verification-2021_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/rbx-land-free-robux_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/how-do-we-get-free-robux_GM431946152.pdf
    • http://pa-kabmadiun.go.id/images/easy-coin-master-hack-without-verification_GM406889139.pdf
    • http://pa-kabmadiun.go.id/images/how-to-get-free-golden-card-in-coin-master_GM406889139.pdf
    • http://pa-kabmadiun.go.id/images/how-do-you-get-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ef.bin
0682c7d6e03d432ac86c59902161509b30f8a9e2727009746cf255eee7cb29fb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EF 25076 bytes
font_01_sfnt_off000082ee.bin
a1db0e26d638f2546736f1f7b434dee98a1c5e726f40723477b7c203db66759e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82EE 19036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.