Malicious PDF — malware analysis report

Static analysis result for SHA-256 452d98a83062c197…

MALICIOUS

PDF

35.4 KB Created: 2021-05-22 09:13:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 42bf00ac9f2631801d0c7f09c74bb557 SHA-1: 58b2255469ddd297deb13f920757a5eac8e6ba00 SHA-256: 452d98a83062c1978d5038da797f7cf08be7d232456801c09d9a9c666db7faa6
82 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and a prominent call-to-action to access a 'TikTok generator', suggesting a lure for free views or in-game currency. The heuristic 'SE_MFA_LURE' indicates the document may also be designed to harvest multi-factor authentication codes or session tokens. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs points towards a potential download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/835599320/free-tiktok-views-game-hack PDF link annotation
    • http://legs11.co.za/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003088.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3088 25208 bytes
SHA-256: d2e88ec95ffe433a704acb43410124f91988063a1fbcfe5d4553ac47feea7bec
font_01_sfnt_off00006a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A57 17752 bytes
SHA-256: fbbed6aa406878393a00abdc0937322fa009c5b8448fdc35bdb3145f27770f26

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