Malicious PDF — malware analysis report

Static analysis result for SHA-256 157cef0dd3343fea…

MALICIOUS

PDF

51.7 KB Created: 2021-05-20 07:32:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b57ebf945ad1671e55d6c18f7814837e SHA-1: cb1b57c795525370905184a030d08a24a1b63387 SHA-256: 157cef0dd3343fea8b5c151cef03d32809bfdb3b3b50dcf6ba880938c4edcec4
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a visual call-to-action, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded URLs point towards lures for game-related cheats, a common tactic for distributing malware or conducting phishing. No scripts were extracted, but the presence of external URIs indicates a potential download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/huskybus.com-free-robux-game-hack PDF link annotation
    • http://moto98.com/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://moto98.com/images/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/tiktok-followers-free-2021_GM835599320.pdfIn PDF document text
    • http://moto98.com/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/how-to-get-free-shields-on-coin-master_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_003_off00004a23.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A23 28944 bytes
SHA-256: 3fb6d5e93ba32e4afa43997d16b3c08d4307c6e87a93ee8fcf6da82c8ebdd199
font_01_sfnt_off00008c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C04 8252 bytes
SHA-256: 7ebedd6b182173c8e55836cb0d114b2c4a0ac85c96a51b9f0706c935f8415fea
font_02_sfnt_off0000a718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA718 18688 bytes
SHA-256: 6add98f93d6464e4673e157e466f8eac90a499b9ef5784f234ada041ea0169f0

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