Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4467af5ae675ab…

MALICIOUS

PDF

37.0 KB Created: 2021-05-25 10:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a4577885fd54a5153595590b70a0dd03 SHA-1: b551203712789929801f0f15036dabb0da6f9802 SHA-256: 4b4467af5ae675ab6ebb58290bb471fefb809f6e11e76c2cdc63c0f4533af619
62 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a document body that explicitly advertises a method to obtain Minecraft for free, which is a common lure for phishing or malware distribution. The ML classifier also flagged the PDF as malicious with high confidence. The presence of multiple links to external domains, some of which are also PDFs, suggests an attempt to redirect the user to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/how-to-get-minecraft-for-free-on-xbox-one-game-hack PDF link annotation
    • http://gbp-trabkiwielkie.pl/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/how-to-get-free-minecoins-in-minecraft_GM479516143.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_off00003587.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3587 25156 bytes
SHA-256: a42653b073b3fd958389b75cc3277f3609e2f6a218ddf30478fc1e7c214121b0
font_01_sfnt_off00006ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC4 18472 bytes
SHA-256: 63446f7755945d37ec8b97d22fda434cb08cbf4c61a02f7f94d2af605f03b611

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