Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef23e0df3c5fc4c…

MALICIOUS

PDF

43.7 KB Created: 2021-05-19 14:29:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a9fe873f07955a831789f649dfd88844 SHA-1: fd4e0e71a2bae082e722a2239e52f2c69d393200 SHA-256: fef23e0df3c5fc4ce10a2f8aa68e7765d1c2aa76d0c8da073df8a9d1be2a9fcb
82 Risk Score

Malware Insights

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

The document contains a lure for game hacks and remote support tools, directing users to download content from external URLs. The presence of a high-confidence ML classifier firing and multiple embedded URLs strongly suggests a malicious intent to deliver a payload. The document's content and heuristics indicate a phishing or social engineering attack aimed at tricking users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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-24-7-minecraft-server-game-hack PDF link annotation
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-link-daily-get-free-spins-amp_GM406889139.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_003_off00004f50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F50 25960 bytes
SHA-256: 9ec936244545075d7b2b5592c752cc559fe90395eaf1fc588e86bb94104b2dfd
font_01_sfnt_off00008964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8964 17924 bytes
SHA-256: 6d441e79e96f2496e7d363a8fd4eac2c27151cb1acb88a4e303d16644f1cdf17

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