Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ed5bf530853e3e…

MALICIOUS

PDF

44.9 KB Created: 2021-05-14 17:28:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bebf7a59290dd21e4b6ccfed3d706cd6 SHA-1: 5211f045de26460177b8c0c40b636018d2e37d5e SHA-256: 43ed5bf530853e3ebf549d419e8cf2941c7c01e8193cfadb9e1993c0cd20a0ca
122 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, that point to websites offering game hacks and free spins. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. The document body, though partially corrupted, contains references to game-related terms and URLs, reinforcing the lure of obtaining in-game advantages. The presence of a "download button" lure and the sheer volume of external links suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/moon-active-games-game-hack
    • https://pagadder.com/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • https://pagadder.com/images/free-robux-no-downloading-apps_GM431946152.pdf
    • https://pagadder.com/images/mcpe-master-hack-unlimited-coins-download_GM406889139.pdf
    • https://pagadder.com/images/coin-master-free-spins-2021-hack_GM406889139.pdf
    • https://pagadder.com/images/coin-master-online-hack_GM406889139.pdf
    • https://pagadder.com/images/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://pagadder.com/images/coin-master-facebook_GM406889139.pdf
    • https://pagadder.com/images/coin-master-free-cards-link-2021_GM406889139.pdf
    • https://pagadder.com/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • https://pagadder.com/images/get-2021-free-spins-on-coin-master_GM406889139.pdf
    • https://pagadder.com/images/coin-master-daily-free-cards_GM406889139.pdf
    • https://pagadder.com/images/free-2021-robux_GM431946152.pdf
    • https://pagadder.com/images/free-roebucks_GM431946152.pdf
    • https://pagadder.com/images/free-coin-master-spins-2021_GM406889139.pdf
    • https://pagadder.com/images/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • https://pagadder.com/images/coin-master-free-spins-link-download_GM406889139.pdf
    • https://pagadder.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://pagadder.com/images/free-robux-download_GM431946152.pdf
    • https://pagadder.com/images/how-to-get-robux-on-phone_GM431946152.pdf
    • https://pagadder.com/images/hack-coin-master-apk-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a3.bin
313604244a862c77ab2663914c175460454e7bb2620a654255c4785f04d04af5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A3 26088 bytes
font_01_sfnt_off000082ea.bin
9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82EA 3124 bytes
font_02_sfnt_off00008dc8.bin
6572202fb11b79787028deba1beb076b209f1779d589edab2c04e97f197d6ee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC8 17920 bytes

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