Malicious PDF — malware analysis report

Static analysis result for SHA-256 308c199042ed62f5…

MALICIOUS

PDF

35.3 KB Created: 2021-05-22 05:07:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 676f751fcb37fdca2a56596a3f5483ac SHA-1: cbcf25b285de7292571a514ec08467cdfd41c7f8 SHA-256: 308c199042ed62f5a87fc99c00459baef861305f0fddf9209b5a53cac1d24a56
60 Risk Score

Malware Insights

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

The PDF document contains social engineering lures, including a fake invoice and a 'Click Here to Download' button, designed to trick the user into clicking an embedded malicious URL. The heuristic 'SE_CLICKFIX' indicates the document instructs the user to press Win+R or paste a command, a common tactic to bypass macro restrictions and directly execute malicious content. The primary malicious URL identified is https://netcdn.xyz/app/479516143/free-minecraft-alt-accounts-game-hack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

Heuristics 5

  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/479516143/free-minecraft-alt-accounts-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F92 25384 bytes
SHA-256: fb4b56a05bcda1b545e4241c530859b96da63cf202b7dc73b17bcbc85831f1f9
font_01_sfnt_off00006a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A37 17924 bytes
SHA-256: ca2704b96dad28857c40796bc5f3f160f1252a4638d6e656e043cddf4ab01458

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