Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5779ea7de01b24b…

MALICIOUS

PDF

38.3 KB Created: 2021-05-22 19:34:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bc64e18c2a333216a6ff16404dcfb0a6 SHA-1: 0e0caabb17bd0a452f9cc2096d45e42e6046f825 SHA-256: b5779ea7de01b24bacd8f53f8475b317c14230c19db5f783e5768316ce526141
82 Risk Score

Malware Insights

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

The PDF document contains embedded links and a visual download button, attempting to trick the user into clicking a link to download a game hack. The 'SE_CLICKFIX' heuristic indicates the document instructs the user to press Win+R or paste a command into a terminal, a common social engineering tactic to bypass security measures. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

Heuristics 4

  • 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
  • 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-ps4-game-hack PDF link annotation
    • http://korporacjaroma.pl/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000327b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327B 25120 bytes
SHA-256: 028d882ba7730ce7f3e9c5e84155752d111d32a268b41289b74fe9da948a08e1
font_01_sfnt_off00006b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B16 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off000074b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B5 18088 bytes
SHA-256: 3c584cfdb2e84eddbd4369948c7cb3512903decb89ab4dae7c156f2377516814

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