Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d84834a9222adda…

MALICIOUS

PDF

48.9 KB Created: 2021-05-14 08:34:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 49eb79fb3750dceaab66f448e19a5b85 SHA-1: f868e1ee000e7f2caf374508ac3254a0fcc5f5c3 SHA-256: 1d84834a9222addabef73f1d97a915c276802df3cf32b1360ea43c6083760040
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to pages offering game-related cheats or currency, suggesting a lure for users seeking such items. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a phishing or scam attempt, likely leading to a malicious download or further phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

Heuristics 4

  • 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.
  • 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/how-to-get-free-robux-without-verification-2021-game-hack
    • http://poonhilltreks.com/userfiles/files/free-coins-spins-on-coin-master_GM406889139.pdf
    • http://poonhilltreks.com/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://poonhilltreks.com/userfiles/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/free-hair-roblox-boy_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdf
    • http://poonhilltreks.com/userfiles/files/how-do-you-get-free-robux_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdf
    • http://poonhilltreks.com/userfiles/files/coin-master-32-mod-hack-apk-download_GM406889139.pdf
    • http://poonhilltreks.com/userfiles/files/easy-way-to-get-free-robux_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/roblox-help-free-robux_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/roblox-com-free-robux_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/free-robux-instantly_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/free-free-robux_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/free-robux-scams_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/earn-robux-today_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/coin-master-free-spin-today-2021_GM406889139.pdf
    • http://poonhilltreks.com/userfiles/files/are-robux-generators-safe_GM431946152.pdf
    • http://poonhilltreks.com/userfiles/files/coin-master-hack-spins-game-download_GM406889139.pdf
    • http://poonhilltreks.com/userfiles/files/fbchampion_GM406889139.pdf
    • http://poonhilltreks.com/userfiles/files/free-minecraft-printables-food-labels_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d0b.bin
d722ac233fe07c6f537113ce953f0aac3e3dfa547bdbbf7a9a0339141d52d3f5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D0B 26920 bytes
font_01_sfnt_off00008c10.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C10 5696 bytes
font_02_sfnt_off00009922.bin
1b346556c7df455cb9a54b8f1a6e3f1a0bfffa2d9228fa0640c35d2bdb9db684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9922 19528 bytes

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