Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f1065ead606a19…

MALICIOUS

PDF

44.5 KB Created: 2021-05-13 03:34:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f16fa20543a8370ef2a99cf582f8854f SHA-1: 08a5e7c564853d2d9f65508692eb7166554a7bf3 SHA-256: 15f1065ead606a1940d56fe37958500e359b0db3f7b4f2e5e8bd2bdbae8ae56c
140 Risk Score

Malware Insights

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

This PDF document contains a malicious redirector link impersonating Facebook to lure users into downloading a "Coin Master Hack Apk". The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button further supports the phishing attempt. The primary IOC is the redirector URL which likely leads to malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-hack-apk-3.5-33-game-hack.
  • 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
  • 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/406889139/coin-master-hack-apk-3.5-33-game-hack In PDF document text
    • https://www.manmed.info:443/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/can-i-have-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-mojang-account-with-minecraft_GM479516143.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_003_off000049a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A9 24636 bytes
SHA-256: 368c9c0dff78a4ee344eaf3fec196a7b14c193f259d782c191a85e839d67b83f
font_01_sfnt_off000081bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BF 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B61 18268 bytes
SHA-256: 207b50af2482ee3d64012f5b90db49de9a3b7179575478186b363639781f396d

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