Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f4b833c1651ba5…

MALICIOUS

PDF

47.2 KB Created: 2021-05-13 10:32:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f590f5f2e8fe4a7d90b9311af9ab6ca2 SHA-1: a7b18acf05477e0e13ebf4f057814ec41848536f SHA-256: 03f4b833c1651ba582f68b65bbc4978a067658ddf64ebc174efd19cc2f708fef
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which appear to be part of a link farm designed to attract users with promises of free game currency. The ML classifier also flagged this PDF as malicious. The presence of a call-to-action phrase further supports a malicious intent to redirect users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/406889139/get-free-coins-for-coin-master-game-hack
    • http://avocatultau.eu/images/coin-master-free-spins-link-quora_GM406889139.pdf
    • http://avocatultau.eu/images/coin-master-free-spins-and-coins_GM406889139.pdf
    • http://avocatultau.eu/images/coin-master-free-coins-link-blogspot_GM406889139.pdf
    • http://avocatultau.eu/images/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • http://avocatultau.eu/images/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdf
    • http://avocatultau.eu/images/minecraft-windows-10-free-code_GM479516143.pdf
    • http://avocatultau.eu/images/roblox-place-rewards_GM431946152.pdf
    • http://avocatultau.eu/images/daily-free-spins-on-coin-master_GM406889139.pdf
    • http://avocatultau.eu/images/spinuri-gratis-coin-master_GM406889139.pdf
    • http://avocatultau.eu/images/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • http://avocatultau.eu/images/do-robux-generators-work_GM431946152.pdf
    • http://avocatultau.eu/images/free-robux-no-gift-card_GM431946152.pdf
    • http://avocatultau.eu/images/free-free-robux_GM431946152.pdf
    • http://avocatultau.eu/images/coin-master-hack-2021-no-human-verification_GM406889139.pdf
    • http://avocatultau.eu/images/coin-master-hack-2021_GM406889139.pdf
    • http://avocatultau.eu/images/roblox-free-robux_GM431946152.pdf
    • http://avocatultau.eu/images/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdf
    • http://avocatultau.eu/images/how-to-hack-coins-in-archery-master-3d_GM406889139.pdf
    • http://avocatultau.eu/images/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://avocatultau.eu/images/coin-master-get-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004adc.bin
865b8122132df4ffd02e20f83290fba1acb189fa816eb3fc6c2297d85691772d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ADC 24856 bytes
font_01_sfnt_off00008341.bin
e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
pdf-font-stream PDF embedded font (sfnt) at offset 0x8341 8676 bytes
font_02_sfnt_off000097cc.bin
80118a78f95baa80ee89349241cf1d538d1c5fbd1ee094de5b41e3586bb22105
pdf-font-stream PDF embedded font (sfnt) at offset 0x97CC 17712 bytes